Computer viruses
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The document discusses different types of computer viruses, including time bombs, logical bombs, worms, boot sector viruses, macro viruses, script viruses, and Trojan horses. It provides descriptions of each type of virus and how they infect systems and damage data. The document also lists actions people can take to prevent virus infections, such as always updating antivirus software, backing up important files, changing boot sequences, and installing security updates promptly.
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Computer viruses
The document discusses different types of computer viruses, including time bombs, logical bombs, worms, boot sector viruses, macro viruses, script viruses, and Trojan horses. It provides descriptions of each type of virus and how they infect systems and damage data. The document also lists actions people can take to prevent virus infections, such as always updating antivirus software, backing up important files, and installing security updates for operating systems and programs.
Computer viruses
This document provides an overview of computer viruses, including their history, concepts, symptoms, types, and preventive measures. It discusses how the first computer virus was created in 1981 and that viruses now number in the millions. Various types of viruses are defined, such as boot sector viruses, browser hijackers, file infectors, and polymorphic viruses. Symptoms of a virus include slow performance, crashes, and file loss. The document concludes with recommendations to use reputable download sources, firewalls, avoid suspicious emails, and install antivirus software to prevent virus infections.
Computer virus & its cure
This document provides an overview of computer viruses and methods for prevention and removal. It defines what a computer virus is and describes different types including boot sector viruses, file infector viruses, worms, macro viruses, and Trojan horses. Examples like Melissa and I Love You are given. Methods for manually removing some common viruses like New Folder.exe and Autorun.inf are outlined. The document stresses the importance of using antivirus software, regularly updating definitions, avoiding unsafe downloads and attachments, and making backups to help prevent and cure computer viruses.
Computer virus
This document defines a computer virus and discusses how viruses spread and the types of damage they can cause. It outlines symptoms of a virus infection and types of viruses like boot sector viruses, macro viruses, and script viruses. The document recommends installing antivirus software from reputable companies, backing up files regularly, being cautious of email attachments, and avoiding unknown programs as ways to prevent virus infections.
Computer viruses
This document defines and describes different types of computer viruses. It begins by defining a computer virus as a program that spreads itself by infecting files and disks without the user's knowledge. It then lists and describes 7 common types of viruses: boot sector viruses, multipartite viruses, worm viruses, email viruses, macro viruses, script viruses, and Trojan horses. The document explains how each type infects and spreads. It concludes by emphasizing the importance of prevention through safe computing practices and using virus protection software.
Virus and antivirus final ppt
This document discusses malware and provides information about common types of malware like viruses, trojans, worms, spyware, and adware. It then discusses antivirus and anti-spyware software that can be used to protect systems from malware by identifying, removing, and preventing malware infections. Regularly updating antivirus software and scanning systems is recommended to keep systems secure from evolving malware threats.
Computer virus 1
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Computer viruses
The document discusses different types of computer viruses, including time bombs, logical bombs, worms, boot sector viruses, macro viruses, script viruses, and Trojan horses. It provides descriptions of each type of virus and how they infect systems and damage data. The document also lists actions people can take to prevent virus infections, such as always updating antivirus software, backing up important files, and installing security updates for operating systems and programs.
Computer viruses
This document provides an overview of computer viruses, including their history, concepts, symptoms, types, and preventive measures. It discusses how the first computer virus was created in 1981 and that viruses now number in the millions. Various types of viruses are defined, such as boot sector viruses, browser hijackers, file infectors, and polymorphic viruses. Symptoms of a virus include slow performance, crashes, and file loss. The document concludes with recommendations to use reputable download sources, firewalls, avoid suspicious emails, and install antivirus software to prevent virus infections.
Computer virus & its cure
This document provides an overview of computer viruses and methods for prevention and removal. It defines what a computer virus is and describes different types including boot sector viruses, file infector viruses, worms, macro viruses, and Trojan horses. Examples like Melissa and I Love You are given. Methods for manually removing some common viruses like New Folder.exe and Autorun.inf are outlined. The document stresses the importance of using antivirus software, regularly updating definitions, avoiding unsafe downloads and attachments, and making backups to help prevent and cure computer viruses.
Computer virus
This document defines a computer virus and discusses how viruses spread and the types of damage they can cause. It outlines symptoms of a virus infection and types of viruses like boot sector viruses, macro viruses, and script viruses. The document recommends installing antivirus software from reputable companies, backing up files regularly, being cautious of email attachments, and avoiding unknown programs as ways to prevent virus infections.
Computer viruses
This document defines and describes different types of computer viruses. It begins by defining a computer virus as a program that spreads itself by infecting files and disks without the user's knowledge. It then lists and describes 7 common types of viruses: boot sector viruses, multipartite viruses, worm viruses, email viruses, macro viruses, script viruses, and Trojan horses. The document explains how each type infects and spreads. It concludes by emphasizing the importance of prevention through safe computing practices and using virus protection software.
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This document discusses malware and provides information about common types of malware like viruses, trojans, worms, spyware, and adware. It then discusses antivirus and anti-spyware software that can be used to protect systems from malware by identifying, removing, and preventing malware infections. Regularly updating antivirus software and scanning systems is recommended to keep systems secure from evolving malware threats.
Computer virus 1
a powerpoint silde to show simple idea what is computer virus.very basic suitable for class 6 students
Computer Virus powerpoint presentation
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Computer Virus powerpoint presentation,Computer Virus powerpoint presentation,Computer Virus powerpoint presentation,Computer Virus powerpoint presentation
Ppt on different types of computer viruses
Computer viruses are programs that damage computer systems and erase data files. There are several types of viruses including time bombs, logical bombs, worms, boot sector viruses, macro viruses, Trojan horses, and script viruses. To prevent virus infection, users should always update antivirus software weekly, back up important files, change boot sequences, avoid unexpected email attachments, install security updates, and get trained on antivirus software.
Computer Virus
This document discusses computer viruses, including what they are, the types of viruses, and how to prevent and remove them. It defines a computer virus as a program that can copy itself and infect other applications and files. The main types are boot sector viruses, which infect boot drives; program viruses, which infect executable files; and multipartite viruses, which combine the two. The document also lists some of the top sources of virus attacks and recommends using antivirus software like Norton, McAfee, and Kaspersky to scan for and remove viruses, as well as maintaining regular updates and safe digital practices.
presentation on computer virus
This document discusses computer viruses including their similarities to biological viruses, how they work and spread, types of viruses, virus detection methods, and prevention. It notes that computer viruses can replicate and spread like biological viruses, infecting host systems and slowing them down. The main types discussed are macro, boot sector, worm, Trojan horse, and logic bomb viruses. Virus detection methods covered include signature-based, behavior-based, and heuristic-based detection. Prevention methods recommended are using antivirus software, not sharing drives without passwords, deleting email attachments, backing up files, and using secure operating systems.
Computer virus and antivirus
I. Antivirus software identifies and removes viruses and other malware from infected computers, and protects against future attacks. The first antivirus software was created in 1987 to combat real-world computer viruses.
II. Antiviruses work by examining files and comparing them to a database of known virus characteristics and definitions. Infected files that match are quarantined to prevent further spreading.
III. Popular antivirus options include free programs like AVG and paid solutions like Norton and Kaspersky, which are effective but may not always restore damaged files to their original state. Regular scanning and updating is needed to maintain protection.
Computer viruses and prevention techniques
Computer viruses can replicate and spread from one computer to another. There are many types of viruses like memory resident viruses, direct action viruses, overwrite viruses, boot sector viruses, macro viruses, and polymorphic viruses. Different viruses infect computers in various ways and hide in different locations. It is important to use antivirus software, firewalls, and avoid opening suspicious email attachments to prevent virus infection. Regularly updating antivirus definitions and being aware of social engineering tricks used by viruses can help keep computers secure.
Computer Viruses
1. Computer viruses are programs that can copy themselves and infect computers without permission by attaching to other files or programs.
2. Viruses have existed since the early 1970s and have caused issues like slow performance, crashes, missing files, and unexpected pop-ups.
3. There are many types of viruses including file infectors, macro viruses, and polymorphic viruses that disguise their code, and each can impact computers in different ways such as corrupting files or redirecting web browsers.
Welcome to my presentation
This presentation introduces computer viruses by defining them as software programs that can copy themselves and attach to other applications and files. It describes three main types of viruses: boot viruses, which infect boot records; program viruses, which infect files like .exe and .sys; and macro viruses, which infect data files like Word documents. The document explains that viruses try to take control of an infected computer system by making copies of themselves and performing potentially harmful tasks without the user's awareness.
Computer virus
Computer viruses are small programs that spread from computer to computer and interfere with operations. They are deliberately created by programmers for reasons like research, pranks, attacks, or financial gain. Viruses typically spread through email attachments, downloads, or infected files on removable drives. Symptoms of infection include slow performance, file changes or damage. People can protect computers by only opening trusted email attachments, backing up files, scanning downloads, and using antivirus software.
Computer Virus.
Computer viruses are small programs that spread from one computer to another and interfere with computer operations. They can corrupt or delete data, use email to spread, or delete everything on the hard disk. There are different types of viruses including boot viruses, program viruses, multipartite viruses, macro viruses, and activex viruses. Viruses usually spread via email, removable disks, or networks. To remove viruses, users should install and update antivirus software and scan the computer. They should also install operating system updates and use a firewall to protect the computer from future infections.
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This document discusses computer viruses, including their definition, types, causes and effects, and prevention and cure. It defines a computer virus as a self-replicating piece of code that can attach itself to files or applications and cause unintended behavior on a computer. Common types include resident, direct action, overwrite, boot sector, and macro viruses. Viruses can spread by infecting the boot sector or programs run in memory. While they don't necessarily damage data, macro viruses in particular can slow computers down or damage documents. The best prevention methods are using antivirus software to continuously scan for viruses and keep definitions up to date, while the best cure is recovering from a backup and reinstalling the operating system if a virus is
Computer Virus And Antivirus-Sumon Chakraborty
The document summarizes computer viruses, how they work, common types of viruses, and antivirus technologies. It discusses how viruses infect systems by attaching to files or residing in memory. Common viruses mentioned include CIH, macro viruses, and I LOVE YOU. Methods of virus detection include using antivirus software to scan for signatures in memory and files. Cleaning involves stopping infected systems, recovering from backups, and reinstalling the operating system with updated antivirus software. Regular backups, antivirus use, and cautious email/download practices are recommended.
Virus and antivirus
Viruses can infect computers and spread from one system to another. Antivirus software identifies and removes viruses, worms, and other malware. It also protects against future attacks. Antivirus programs scan files and compare them to virus definitions to identify infected files for removal or quarantine. They also work to prevent the spread of viruses by examining files during activities like email and removable media use. General precautions include regularly updating antivirus software and other programs, and scanning removable media for viruses before use.
W 12 computer viruses
The document discusses various types of computer viruses and malware, how they infect systems, and methods for protection. It describes macro viruses, boot sector viruses, polymorphic viruses, file infectors, Trojan horses, worms, and famous viruses like Melissa and ILOVEYOU. Protection methods include antivirus software that uses virus definitions and behavior analysis to detect viruses, as well as firewalls that block unauthorized network traffic.
Virus and its types 2
Computer viruses are types of malicious software that replicate by inserting copies of themselves into other programs and files. When activated, viruses infect hosts by looking for programs to insert themselves into. There are many types of viruses, including Trojan horses, spyware, boot sector viruses, time bombs, browser hijackers, file infector viruses, adware, and worms. Ransomware is a malicious program that encrypts a user's files and demands payment to decrypt them, carrying out attacks through disguised email attachments or automatically spreading worms.
virus and antivirus
a small presentation on virus and anti virus. and its prevention and cure. and also the effects of virus in computers.
ANTIVIRUS AND VIRUS Powerpoint presentation
This document provides an overview of computer viruses and anti-virus software. It defines what viruses are and how they spread, describes common types of viruses. It then explains what anti-virus software is, how it works to detect and remove viruses, and lists some popular anti-virus programs. It concludes with a brief history of anti-virus software development from the late 1980s onward.
Virus & Antivirus
Computer viruses are malicious programs that can damage computers. They replicate by attaching themselves to other programs and spreading from computer to computer. Antivirus software identifies and removes viruses using a virus dictionary to examine files and detect known virus codes. It is important to regularly update antivirus software and scan computers to remove viruses and prevent further infection. Popular antivirus programs provide daily updates and scanning tools to detect and remove viruses through repair, quarantine, deletion or other actions.
Virus-Awareness
A brief presentation over computer viruses, which is presently ignored by most computer users.
Made by Utkarsh Srivastava for college 'routine task' purpose!
computer viruses power point presentation
The document discusses computer viruses, how they spread, types of viruses, and how to prevent and cure virus infections. Computer viruses are software programs that replicate like biological viruses and can spread by attaching to other files. When files are exchanged between computers, the virus can spread. Viruses can slow down systems, use memory, and even crash computers. Antivirus software can be installed to prevent and remove viruses, and files should only be downloaded from trusted sources.
Computer virus
a brief introduction about computer viruses, their types, how they spread and what precautions should be followed to stay unaffected.
Ascomputervirus
This document defines and describes different types of computer viruses. It explains that a computer virus is a program that damages computer systems and destroys or erases data files. It then lists and provides brief descriptions of common virus types, including worms, time bombs, logical bombs, boot sector viruses, macro viruses, script viruses, and Trojan horses. The document concludes by offering tips to prevent virus infection, such as regularly updating antivirus software, backing up files, and being cautious of unexpected email attachments.
As computer virus
This document defines and describes different types of computer viruses. It explains that a computer virus is a program that damages computer systems and destroys or erases data files. It then lists and provides details on various types of viruses, including time bombs, logical bombs, worms, boot sector viruses, macro viruses, script viruses, and Trojan horses. The document concludes by offering actions people can take to prevent virus infections, such as updating anti-virus software weekly, backing up important files, and being cautious of unexpected email attachments.
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Ppt on different types of computer viruses
Computer viruses are programs that damage computer systems and erase data files. There are several types of viruses including time bombs, logical bombs, worms, boot sector viruses, macro viruses, Trojan horses, and script viruses. To prevent virus infection, users should always update antivirus software weekly, back up important files, change boot sequences, avoid unexpected email attachments, install security updates, and get trained on antivirus software.
Computer Virus
This document discusses computer viruses, including what they are, the types of viruses, and how to prevent and remove them. It defines a computer virus as a program that can copy itself and infect other applications and files. The main types are boot sector viruses, which infect boot drives; program viruses, which infect executable files; and multipartite viruses, which combine the two. The document also lists some of the top sources of virus attacks and recommends using antivirus software like Norton, McAfee, and Kaspersky to scan for and remove viruses, as well as maintaining regular updates and safe digital practices.
presentation on computer virus
This document discusses computer viruses including their similarities to biological viruses, how they work and spread, types of viruses, virus detection methods, and prevention. It notes that computer viruses can replicate and spread like biological viruses, infecting host systems and slowing them down. The main types discussed are macro, boot sector, worm, Trojan horse, and logic bomb viruses. Virus detection methods covered include signature-based, behavior-based, and heuristic-based detection. Prevention methods recommended are using antivirus software, not sharing drives without passwords, deleting email attachments, backing up files, and using secure operating systems.
Computer virus and antivirus
I. Antivirus software identifies and removes viruses and other malware from infected computers, and protects against future attacks. The first antivirus software was created in 1987 to combat real-world computer viruses.
II. Antiviruses work by examining files and comparing them to a database of known virus characteristics and definitions. Infected files that match are quarantined to prevent further spreading.
III. Popular antivirus options include free programs like AVG and paid solutions like Norton and Kaspersky, which are effective but may not always restore damaged files to their original state. Regular scanning and updating is needed to maintain protection.
Computer viruses and prevention techniques
Computer viruses can replicate and spread from one computer to another. There are many types of viruses like memory resident viruses, direct action viruses, overwrite viruses, boot sector viruses, macro viruses, and polymorphic viruses. Different viruses infect computers in various ways and hide in different locations. It is important to use antivirus software, firewalls, and avoid opening suspicious email attachments to prevent virus infection. Regularly updating antivirus definitions and being aware of social engineering tricks used by viruses can help keep computers secure.
Computer Viruses
1. Computer viruses are programs that can copy themselves and infect computers without permission by attaching to other files or programs.
2. Viruses have existed since the early 1970s and have caused issues like slow performance, crashes, missing files, and unexpected pop-ups.
3. There are many types of viruses including file infectors, macro viruses, and polymorphic viruses that disguise their code, and each can impact computers in different ways such as corrupting files or redirecting web browsers.
Welcome to my presentation
This presentation introduces computer viruses by defining them as software programs that can copy themselves and attach to other applications and files. It describes three main types of viruses: boot viruses, which infect boot records; program viruses, which infect files like .exe and .sys; and macro viruses, which infect data files like Word documents. The document explains that viruses try to take control of an infected computer system by making copies of themselves and performing potentially harmful tasks without the user's awareness.
Computer virus
Computer viruses are small programs that spread from computer to computer and interfere with operations. They are deliberately created by programmers for reasons like research, pranks, attacks, or financial gain. Viruses typically spread through email attachments, downloads, or infected files on removable drives. Symptoms of infection include slow performance, file changes or damage. People can protect computers by only opening trusted email attachments, backing up files, scanning downloads, and using antivirus software.
Computer Virus.
Computer viruses are small programs that spread from one computer to another and interfere with computer operations. They can corrupt or delete data, use email to spread, or delete everything on the hard disk. There are different types of viruses including boot viruses, program viruses, multipartite viruses, macro viruses, and activex viruses. Viruses usually spread via email, removable disks, or networks. To remove viruses, users should install and update antivirus software and scan the computer. They should also install operating system updates and use a firewall to protect the computer from future infections.
Rajul computer presentation
This document discusses computer viruses, including their definition, types, causes and effects, and prevention and cure. It defines a computer virus as a self-replicating piece of code that can attach itself to files or applications and cause unintended behavior on a computer. Common types include resident, direct action, overwrite, boot sector, and macro viruses. Viruses can spread by infecting the boot sector or programs run in memory. While they don't necessarily damage data, macro viruses in particular can slow computers down or damage documents. The best prevention methods are using antivirus software to continuously scan for viruses and keep definitions up to date, while the best cure is recovering from a backup and reinstalling the operating system if a virus is
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The document summarizes computer viruses, how they work, common types of viruses, and antivirus technologies. It discusses how viruses infect systems by attaching to files or residing in memory. Common viruses mentioned include CIH, macro viruses, and I LOVE YOU. Methods of virus detection include using antivirus software to scan for signatures in memory and files. Cleaning involves stopping infected systems, recovering from backups, and reinstalling the operating system with updated antivirus software. Regular backups, antivirus use, and cautious email/download practices are recommended.
Virus and antivirus
Viruses can infect computers and spread from one system to another. Antivirus software identifies and removes viruses, worms, and other malware. It also protects against future attacks. Antivirus programs scan files and compare them to virus definitions to identify infected files for removal or quarantine. They also work to prevent the spread of viruses by examining files during activities like email and removable media use. General precautions include regularly updating antivirus software and other programs, and scanning removable media for viruses before use.
W 12 computer viruses
The document discusses various types of computer viruses and malware, how they infect systems, and methods for protection. It describes macro viruses, boot sector viruses, polymorphic viruses, file infectors, Trojan horses, worms, and famous viruses like Melissa and ILOVEYOU. Protection methods include antivirus software that uses virus definitions and behavior analysis to detect viruses, as well as firewalls that block unauthorized network traffic.
Virus and its types 2
Computer viruses are types of malicious software that replicate by inserting copies of themselves into other programs and files. When activated, viruses infect hosts by looking for programs to insert themselves into. There are many types of viruses, including Trojan horses, spyware, boot sector viruses, time bombs, browser hijackers, file infector viruses, adware, and worms. Ransomware is a malicious program that encrypts a user's files and demands payment to decrypt them, carrying out attacks through disguised email attachments or automatically spreading worms.
virus and antivirus
a small presentation on virus and anti virus. and its prevention and cure. and also the effects of virus in computers.
ANTIVIRUS AND VIRUS Powerpoint presentation
This document provides an overview of computer viruses and anti-virus software. It defines what viruses are and how they spread, describes common types of viruses. It then explains what anti-virus software is, how it works to detect and remove viruses, and lists some popular anti-virus programs. It concludes with a brief history of anti-virus software development from the late 1980s onward.
Virus & Antivirus
Computer viruses are malicious programs that can damage computers. They replicate by attaching themselves to other programs and spreading from computer to computer. Antivirus software identifies and removes viruses using a virus dictionary to examine files and detect known virus codes. It is important to regularly update antivirus software and scan computers to remove viruses and prevent further infection. Popular antivirus programs provide daily updates and scanning tools to detect and remove viruses through repair, quarantine, deletion or other actions.
Virus-Awareness
A brief presentation over computer viruses, which is presently ignored by most computer users.
Made by Utkarsh Srivastava for college 'routine task' purpose!
computer viruses power point presentation
The document discusses computer viruses, how they spread, types of viruses, and how to prevent and cure virus infections. Computer viruses are software programs that replicate like biological viruses and can spread by attaching to other files. When files are exchanged between computers, the virus can spread. Viruses can slow down systems, use memory, and even crash computers. Antivirus software can be installed to prevent and remove viruses, and files should only be downloaded from trusted sources.
Computer virus
a brief introduction about computer viruses, their types, how they spread and what precautions should be followed to stay unaffected.
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This document defines and describes different types of computer viruses. It explains that a computer virus is a program that damages computer systems and destroys or erases data files. It then lists and provides brief descriptions of common virus types, including worms, time bombs, logical bombs, boot sector viruses, macro viruses, script viruses, and Trojan horses. The document concludes by offering tips to prevent virus infection, such as regularly updating antivirus software, backing up files, and being cautious of unexpected email attachments.
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This document defines and describes different types of computer viruses. It explains that a computer virus is a program that damages computer systems and destroys or erases data files. It then lists and provides details on various types of viruses, including time bombs, logical bombs, worms, boot sector viruses, macro viruses, script viruses, and Trojan horses. The document concludes by offering actions people can take to prevent virus infections, such as updating anti-virus software weekly, backing up important files, and being cautious of unexpected email attachments.
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This document defines and describes different types of computer viruses. It explains that a computer virus is a program that damages computer systems and destroys or erases data files. It then lists and provides details on various types of viruses, including time bombs, logical bombs, worms, boot sector viruses, macro viruses, script viruses, and Trojan horses. The document concludes by offering actions people can take to prevent virus infections, such as updating anti-virus software weekly, backing up important files, and being cautious of unexpected email attachments.
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A computer virus is a program that damages computer systems and destroys or erases data files. There are several types of viruses including time bombs, logical bombs, worms, boot sector viruses, macro viruses, Trojan horses, and script viruses. To prevent virus infections, users should always keep antivirus software updated, back up important files, change boot sequences, avoid sharing drives without passwords, empty removable disks before use, be wary of email attachments, get trained on antivirus software, have multiple backups, install all security updates promptly, and continually learn more about computer security.
Computer virus
This document discusses computer viruses. It defines a computer virus as a program that can copy itself and infect computers without the user's permission or knowledge. It notes that viruses can slow down systems, steal data, delete files, and more. The document outlines different types of viruses like time bombs, worms, and Trojan horses. It lists symptoms of virus infection and recommendations for preventing viruses like regularly updating anti-virus software and creating backups.
Computer vrise
A computer virus is a program that damages computer systems and destroys or erases data files. There are several types of computer viruses, including time bombs that perform activities on particular dates, logical bombs that perform activities after certain actions occur, and worms that are destructive programs that self-replicate and clog systems. Other types are boot sector viruses that infect the boot sector and load during startup to destroy data, macro viruses associated with programs like Word and Excel that load from infected documents to destroy data, and script viruses written in languages like Visual Basic Scripting and JavaScript.
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A virus is a small piece of software that inserts copies of itself into other executable programs and code in order to spread. It piggybacks on real programs to execute. There are several types of viruses including boot sector viruses, which infect the boot sector and slow down or stop system operations, and macro viruses, which are associated with applications like Word and Excel and destroy data when an infected document is opened. It is important to take actions like updating anti-virus software weekly, having backups, and being cautious of unexpected email attachments to prevent virus infections.
Virus
A virus is a small piece of software that inserts copies of itself into other executable programs and code in order to spread. It piggybacks on real programs to execute. There are several types of viruses including boot sector viruses, which infect the boot sector and slow down or stop system operations, and macro viruses, which are associated with applications like Word and Excel and destroy data when an infected document is opened. It is important to take actions like updating anti-virus software weekly, having backups, and being cautious of unexpected email attachments to prevent virus infections.
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This document discusses malware and how antivirus software works to protect systems. It defines malware as software designed to harm systems without consent. Common types of malware include viruses, trojans, spyware, adware, and rootkits. Viruses can damage data and systems. Antivirus software uses virus definitions and monitors program behavior to identify malware. It provides regular updates to address new threats and scans systems to find and remove malware. Disconnecting systems from networks and running full antivirus scans is recommended if malware is suspected.
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This document discusses computer viruses and antivirus programs. It defines viruses and lists common types like boot sector viruses, file infector viruses, and macro viruses. It then explains how antivirus software works using dictionary and behavior-based approaches to identify viruses. The document provides tips for selecting, configuring, and using antivirus software, including performing regular scans and updates. It also outlines precautions like scanning removable drives and keeping software updated to help prevent virus attacks.
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Computer viruses
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Computer viruses and antiviruses
A computer virus is a malicious program that can copy itself and infect computers without permission. It spreads when an infected computer is connected to uninfected ones, such as via a network or removable storage. There are different types of viruses that infect different parts of a computer system. Malware is a broader term that includes viruses as well as other malicious software like spyware, adware, worms, and trojans. Anti-virus software uses techniques like signature matching, sandboxing, and heuristics to identify and remove viruses and other malware from an infected system. Users should practice safe computing habits and use anti-virus software to help prevent and remove virus infections.
Computer viruses and antiviruses PPT
A computer virus is a malicious program that can copy itself and infect computers without permission. It spreads when an infected computer is connected to uninfected ones, such as via a network or removable storage. There are different types of viruses that infect different parts of a computer system. Malware is a broader term that includes viruses as well as other malicious software like spyware, adware, worms, and trojans. Anti-virus software uses techniques like signature matching, sandboxing, and heuristics to identify and remove viruses and other malware from an infected system. Users should practice safe computing habits and use anti-virus software to help prevent and remove virus infections.
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This document discusses different types of computer viruses and how to prevent them. It defines viruses and explains how they spread by attaching to other program files or through external storage devices. Common symptoms of a virus are slow computer performance, low memory, and files being deleted. The presentation recommends using up-to-date antivirus software, enabling firewalls, and being cautious of email attachments to prevent virus infection. Various virus types are outlined, including boot sector viruses, program file viruses, macro viruses, and malware like worms and spyware.
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The document discusses computer viruses and antivirus technologies. It begins with defining computer viruses and outlining their history. It then analyzes three common types of viruses: file infectors, macro viruses, and the "I LOVE YOU" virus. The document also describes how antivirus software detects and removes viruses and outlines best practices for preventing virus infections like regular backups and keeping antivirus definitions up to date.
Computer Viruses
A computer virus is a malicious software program that spreads by copying itself to other computers. It can corrupt or delete data on a computer. Viruses are often spread through email attachments, downloads, and removable media. There are several types of viruses including boot viruses, program viruses, macro viruses, and polymorphic viruses. Symptoms of a virus infection include programs not working properly, critical files being deleted, and the computer running slower. It is important to have antivirus software installed and keep it updated to protect computers from virus infections.
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This document discusses computer viruses, including how they spread, different types of viruses, signs of infection, preventions, and virus removal. It defines a computer virus as malicious code that replicates by copying itself to another program or document. The document outlines several types of viruses like file infectors, macro viruses, overwrite viruses, and boot sector viruses. It also provides tips for preventing virus infection through firewalls, patching, and antivirus software, as well as steps for removing a virus through safe mode and virus scanning.
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Computer viruses
- 1. COMPUTER VIRUSES CREATED BY : MANVI GUPTA
- 2. WHAT IS VIRUS ? Computer virus refers to a program which damages computer systems and/or destroys or erases data files.
- 3. TYPES OF VIRUSES TIME BOMB LOGICAL BOMB WORM BOOT SECTOR VIRUS MACROS VIRUS SCRIPT VIRUS TROJAN HORSE
- 4. TIME BOMB A time bomb is a virus program that performs an activity on a particular date. LOGICAL BOMB A logical bomb is a destructive program that performs an activity when a certain action has occurred.
- 5. WORM VIRUS A worm is also a destructive program that fills a computer system with self-replicating information, clogging the system so that its operations are slowed down or stopped . BOOT SECTOR VIRUS A boot sector virus infects boot sector of computers. During system boot, boot sector virus is loaded into main memory and destroys data stored in hard disk.
- 6. MACRO VIRUS A macro virus is associated with application software like word and excel. When opening the infected document, macro virus is loaded into main memory and destroys the data stored in hard disk. SCRIPT VIRUS Commonly found script viruses are written using the Visual Basic Scripting edition (VBS) and the JavaScript programming languages.
- 7. TROJAN HORSE Trojan Horse usually comes with monitoring tools and key loggers . Trojan Horse is a destructive program. It usually pretends as computer games or application software. If executed, computer system will be damaged.
- 9. Actions to prevent virus infection • Always update your anti-virus software at least weekly. • Back up your important files and ensure that they can be restored. • Change the computer's boot sequence to always start the PC from its hard drive • Don't share Drive C: without a password and without read-only restrictions.
- 10. • Empty floppy drives of diskettes before turning on computers, especially laptops. • Install security updates for your operating system and programs as soon as possible. • Jump at the chance to learn more about your computer. This will help you spot viruses.