Computer Viruses
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Viruses have evolved over time, starting with early viruses that spread through floppy disks and computer bulletin boards as personal computers became more widely used. Computer viruses are named after biological viruses due to shared traits of replicating themselves. Viruses learn new tricks like infecting boot sectors to copy to other disks and machines, while worms are programs that copy themselves between devices. Protection involves using secure operating systems, avoiding untrusted programs, enabling macro virus protection, and not opening executable email attachments.
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Computer viruses
This document discusses computer viruses and malware. It defines different types of viruses like boot viruses, program viruses, polymorphic viruses, stealth viruses, and macro viruses. It also discusses worms, trojan horses, spam, and other types of malware. The document advocates for the potential use of "good viruses" that could help update antivirus software on networks rather than cause harm. It acknowledges the ongoing arms race between viruses and antivirus technology.
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This document summarizes a seminar presentation on computer viruses and antiviruses. It defines different types of viruses like email viruses, worms, and Trojan horses. It also discusses what computer systems viruses can infect, like the system sector or macro files. The document outlines antivirus software functions like scanning, integrity checking, and interception. It provides guidelines for safe computing practices and approaches that antivirus software uses to detect viruses, like signatures, sandboxing, and heuristics. The conclusion emphasizes the importance of antivirus protection and dealing safely with infections.
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The document discusses the history of computer worms and viruses. It describes how the first widely known worm, the Morris worm, was created by a graduate student in 1988 and how he was later convicted. It defines worms as software that replicates itself across a network by exploiting security vulnerabilities. The document also provides details on typical functions of computer viruses today, how viruses spread through email, and examples like the Melissa virus. It concludes with recommendations for prevention like keeping systems updated and using antivirus software.
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1) Antivirus programs protect computers from viruses by identifying and removing any viruses found in memory, storage media, or incoming files. They work by scanning for programs that modify the boot program, operating system, or other programs normally only read from.
2) Antivirus programs identify viruses by looking for known virus signatures or definitions and updating these signature files regularly to protect against new viruses.
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This document discusses viruses and worms, including their types, lifecycles, advantages, and disadvantages. It defines viruses as code that attaches itself to other programs to damage computer systems or networks, while worms are a type of virus that can replicate itself but not attach to other programs. The document outlines different types of viruses and phases in their lifecycles. It compares viruses to worms and lists disadvantages like deleting files or causing system malfunctions. The conclusion recommends using antivirus software and Linux to protect against viruses and worms.
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The document discusses computer viruses and how they spread from one computer to another and interfere with operations. It defines viruses and describes some common types like macro viruses, boot sector viruses, worms, Trojan horses, and logic bombs. Symptoms of a virus infection are described as slower computer performance, freezing, error messages and application problems. The document also outlines how viruses attack systems and explains that anti-virus software can help protect computers by monitoring programs, updating definitions, and being cautious of downloads.
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This document discusses the importance of using antivirus programs to protect computers and networks from security risks like viruses, worms, and Trojan horses. It explains that antivirus programs work by identifying and removing viruses from a computer's memory, storage, and incoming files using virus signatures and definitions. It also notes that many antivirus programs allow users to automatically update their virus signature files online for free, and that regularly updating these signatures is important to protect against new viruses.
Computer viruses
Computer viruses are malware designed to crash operating systems or modify computers. There are many types of viruses like Trojan horses, Win32 viruses, and AGI-Plan viruses. To protect against viruses and hacking, people should use antivirus programs, firewalls, strong passwords, scan devices daily, only download from trusted sources, and deploy other security measures. Basic viruses can be created in Notepad using Visual Basic script to eject CD drives or batch files to crash a PC, showing how important defenses are. Hacking involves accessing passwords, files, or computers without permission through methods like phishing, smishing, or malware. Strong security practices are needed to prevent unauthorized access.
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Computer viruses
This document discusses computer viruses and malware. It defines different types of viruses like boot viruses, program viruses, polymorphic viruses, stealth viruses, and macro viruses. It also discusses worms, trojan horses, spam, and other types of malware. The document advocates for the potential use of "good viruses" that could help update antivirus software on networks rather than cause harm. It acknowledges the ongoing arms race between viruses and antivirus technology.
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1) Antivirus programs protect computers from viruses by identifying and removing any viruses found in memory, storage media, or incoming files. They work by scanning for programs that modify the boot program, operating system, or other programs normally only read from.
2) Antivirus programs identify viruses by looking for known virus signatures or definitions and updating these signature files regularly to protect against new viruses.
3) While methods that guarantee safety from viruses don't exist, installing and regularly updating antivirus software is an effective way to safeguard computers and data from loss or damage from viruses.
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This document discusses viruses and worms, including their types, lifecycles, advantages, and disadvantages. It defines viruses as code that attaches itself to other programs to damage computer systems or networks, while worms are a type of virus that can replicate itself but not attach to other programs. The document outlines different types of viruses and phases in their lifecycles. It compares viruses to worms and lists disadvantages like deleting files or causing system malfunctions. The conclusion recommends using antivirus software and Linux to protect against viruses and worms.
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The document discusses computer viruses and how they spread from one computer to another and interfere with operations. It defines viruses and describes some common types like macro viruses, boot sector viruses, worms, Trojan horses, and logic bombs. Symptoms of a virus infection are described as slower computer performance, freezing, error messages and application problems. The document also outlines how viruses attack systems and explains that anti-virus software can help protect computers by monitoring programs, updating definitions, and being cautious of downloads.
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This document discusses the importance of using antivirus programs to protect computers and networks from security risks like viruses, worms, and Trojan horses. It explains that antivirus programs work by identifying and removing viruses from a computer's memory, storage, and incoming files using virus signatures and definitions. It also notes that many antivirus programs allow users to automatically update their virus signature files online for free, and that regularly updating these signatures is important to protect against new viruses.
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Computer viruses are malware designed to crash operating systems or modify computers. There are many types of viruses like Trojan horses, Win32 viruses, and AGI-Plan viruses. To protect against viruses and hacking, people should use antivirus programs, firewalls, strong passwords, scan devices daily, only download from trusted sources, and deploy other security measures. Basic viruses can be created in Notepad using Visual Basic script to eject CD drives or batch files to crash a PC, showing how important defenses are. Hacking involves accessing passwords, files, or computers without permission through methods like phishing, smishing, or malware. Strong security practices are needed to prevent unauthorized access.
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Antivirus programs are an effective way to protect computers from viruses by identifying and removing viruses from a computer's memory, storage, and incoming files. Antivirus software works by scanning for programs that modify the boot program, operating system, and other programs. It also automatically scans files downloaded from the web and email attachments. Antivirus programs use virus signatures or definitions to identify viruses, and users can update these signatures automatically from the web. Regularly updating signature files is important for protecting against new viruses. While no methods completely guarantee security, installing and using antivirus software effectively safeguards computers.
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This document provides an introduction to computer viruses, including what they are, their types, how they spread and cause harm, common sources of virus attacks, and the best antivirus software. It discusses three main types of viruses - boot viruses, program viruses, and macro viruses - and explains how each infects different parts of a computer system. The top five sources of virus attacks are listed as downloadable programs, cracked software, email attachments, the internet, and booting from CDs. Three highly effective antivirus programs are highlighted: Norton antivirus, MacAfee virus scan, and Kaspersky antivirus.
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Antivirus programs are an effective way to protect computers from viruses. They work by identifying and removing viruses found in memory, storage media, or incoming files. Many antivirus programs also automatically scan files downloaded from the web, email attachments, opened files, and removable media inserted into the computer. Antivirus programs use virus signatures or definitions to identify viruses, and most allow users to automatically update these signatures from the web to protect against newly discovered viruses. While no method can guarantee complete safety, installing and regularly updating an antivirus program is an effective technique to safeguard computers from virus threats.
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Antivirus programs are an effective way to protect computers from viruses. They work by identifying and removing viruses found in memory, storage media, or incoming files. Many antivirus programs also automatically scan files downloaded from the web, email attachments, opened files, and removable media inserted into the computer. Antivirus programs use virus signatures or definitions to identify viruses, and most allow users to automatically update these signatures from the web to protect against newly discovered viruses. While no method can guarantee complete safety, installing and regularly updating an antivirus program is an effective technique to safeguard computers from virus threats.
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This document discusses the importance of using antivirus programs to protect computers and networks from security risks like viruses, worms, and Trojan horses. It explains that antivirus programs work by scanning for viruses using virus signatures and definitions, and that they should be regularly updated online to protect against new viruses. While no method can guarantee complete safety, installing and updating an antivirus program is an effective technique for safeguarding computers and networks from potential data loss or damage from malware.
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This document discusses the importance of using antivirus programs to protect computers and networks from security risks like viruses, worms, and Trojan horses. It explains that antivirus programs work by identifying and removing viruses from a computer's memory, storage, and incoming files. They also automatically scan files downloaded from the web and email attachments. Antivirus programs use virus signatures and definitions to identify viruses, and users can update these definitions regularly online for free. While no methods can completely guarantee security, installing and regularly updating an antivirus program is an effective technique for safeguarding computers.
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1. The document discusses types of computer viruses, how they infect systems, and methods for detecting and preventing viral infections. It covers system/boot sector viruses, file viruses, macro viruses, polymorphic viruses, and others.
2. Detection methods discussed include scanning for virus signatures, integrity checking, interception, code emulation, and heuristic analysis. The document also lists countermeasures like installing antivirus software and regularly updating and running scans.
3. Real world examples of viruses are mentioned, like the "I LOVE YOU" virus from 2000 which spread through email attachments and caused major disruptions.
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Antivirus programs are an effective way to protect computers from viruses. They work by scanning files, memory, and storage media to identify and remove computer viruses. Antivirus software uses virus signatures or definitions of known virus code to identify viruses. It is important for users to regularly update their antivirus programs to download the latest virus definitions and protect against new viruses. While no methods can guarantee complete safety, installing and keeping updated antivirus software is an effective technique to safeguard computers and networks from viruses.
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This document discusses different types of computer viruses and provides tips to prevent viruses. It describes three main types of viruses: file infectors, boot sector viruses, and Trojan horse viruses. It notes that Windows XP deals with viruses more seriously and recommends using antivirus programs to protect systems. Two specific tips provided are to be careful with floppy disks which are a main virus source, and to exercise caution when downloading files from the internet. It also stresses the importance of keeping antivirus programs and virus libraries up-to-date, as over 100 new virus strains are released each month.
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This document discusses the importance of using antivirus programs to protect computers and data from security risks like viruses. It explains that antivirus programs work by identifying and removing viruses from a computer's memory, storage, and incoming files. They also scan files downloaded from the web and email attachments for viruses. Antivirus programs rely on virus signatures and definitions to identify viruses, and it is important for users to regularly update these signatures to protect against new viruses. While no methods can completely guarantee safety, installing and properly using an antivirus program is an effective technique for safeguarding computers and networks from viruses.
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This document discusses viruses and anti-viruses. It defines a computer virus as a small software program that spreads from computer to computer and interferes with operations. Viruses work by attaching themselves to other programs. An anti-virus is software that identifies and removes viruses and other malware. It examines files and compares them to virus definitions to detect infections. Common virus types include Trojans, boot sector viruses, and worms. Popular anti-virus software includes AVG, McAfee, and Norton, which regularly scan systems and delete any found viruses. The disadvantages of viruses are they can crash systems, delete files, slow computers down, and damage hardware. Anti-viruses provide protection from viruses and malware as well as
Presentation on virus
ier, computer in education, dhaka university, educational technology, introduction to computer, bangladesh education , protik ray, education computer
1311782 634629102605888750
A computer virus is a program that spreads from one computer to another and interferes with computer operation. Viruses can corrupt or delete data. They replicate by attaching themselves to other programs or files. Common types include macro, polymorphic, and metamorphic viruses. Symptoms of a virus include slow performance, random restarts, and loss of disk space. Viruses are typically spread through email attachments, networks, removable media, and pirated software. People create viruses for fun, profit, or revenge, while info attackers aim to disrupt networks. To protect against viruses, users should install and regularly update antivirus software, avoid unknown emails/files, and use security measures like firewalls.
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Mobile devices face security threats from attacks based on WiFi, networks, SMS, MMS, and software vulnerabilities. Malware like viruses, worms, and malware can spread from insecure phones and target user data, identity, and availability. To improve security, mobile devices can enable user authentication, verify app authenticity, install antivirus and firewalls, enable encryption, and provide security training for users.
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A computer virus is a malicious program that loads onto a user's device and performs unwanted actions like replicating and infecting other programs. There are several types of viruses including direct action, browser hijackers, overwrite, web scripting, boot sector, macro, directory, polymorphic, file infector, and encrypted viruses. Common sources of virus infections are downloading programs, pirated software, email attachments, the internet, booting from unknown disks, Bluetooth, and unpatched software. Businesses are especially vulnerable to viruses that can damage client data, customer relationships, finances, and reputation. Key protections include keeping software updated, avoiding email links, using antivirus software, backing up data, strong passwords, firewalls, limiting
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Antivirus programs are an effective way to protect computers from viruses by identifying and removing viruses from a computer's memory, storage, and incoming files. Antivirus software works by scanning for programs that modify the boot program, operating system, and other programs. It also automatically scans files downloaded from the web and email attachments. Antivirus programs use virus signatures or definitions to identify viruses, and users can update these signatures automatically from the web. Regularly updating signature files is important for protecting against new viruses. While no methods completely guarantee security, installing and using antivirus software effectively safeguards computers.
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Antivirus programs are an effective way to protect computers from viruses. They work by identifying and removing viruses found in memory, storage media, or incoming files. Many antivirus programs also automatically scan files downloaded from the web, email attachments, opened files, and removable media inserted into the computer. Antivirus programs use virus signatures or definitions to identify viruses, and most allow users to automatically update these signatures from the web to protect against newly discovered viruses. While no method can guarantee complete safety, installing and regularly updating an antivirus program is an effective technique to safeguard computers from virus threats.
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Antivirus programs are an effective way to protect computers from viruses. They work by identifying and removing viruses found in memory, storage media, or incoming files. Many antivirus programs also automatically scan files downloaded from the web, email attachments, opened files, and removable media inserted into the computer. Antivirus programs use virus signatures or definitions to identify viruses, and most allow users to automatically update these signatures from the web to protect against newly discovered viruses. While no method can guarantee complete safety, installing and regularly updating an antivirus program is an effective technique to safeguard computers from virus threats.
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Antivirus programs are an effective way to protect computers from viruses. They work by identifying and removing viruses found in memory, storage media, or incoming files. Many antivirus programs also automatically scan files downloaded from the web, email attachments, opened files, and removable media inserted into the computer. Antivirus programs use virus signatures or definitions to identify viruses, and most allow users to automatically update these signatures from the web to protect against newly discovered viruses. While no method can guarantee complete safety, installing and regularly updating an antivirus program is an effective technique to safeguard computers from virus threats.
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This document discusses the importance of using antivirus programs to protect computers and networks from security risks like viruses, worms, and Trojan horses. It explains that antivirus programs work by scanning for viruses using virus signatures and definitions, and that they should be regularly updated online to protect against new viruses. While no method can guarantee complete safety, installing and updating an antivirus program is an effective technique for safeguarding computers and networks from potential data loss or damage from malware.
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This document discusses the importance of using antivirus programs to protect computers and networks from security risks like viruses, worms, and Trojan horses. It explains that antivirus programs work by identifying and removing viruses from a computer's memory, storage, and incoming files. They also automatically scan files downloaded from the web and email attachments. Antivirus programs use virus signatures and definitions to identify viruses, and users can update these definitions regularly online for free. While no methods can completely guarantee security, installing and regularly updating an antivirus program is an effective technique for safeguarding computers.
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There are 10 main types of viruses that are classified based on their behavior and abilities: boot sector viruses, companion viruses, encrypted viruses, logic bomb viruses, macro viruses, multipartite viruses, nonresident viruses, polymorphic viruses, resident viruses, and stealth viruses. Each type has distinct characteristics, such as boot sector viruses' ability to hide in the boot sector and load at system boot, companion viruses' creation of additional files in the same directory, and stealth viruses' capability to intercept antivirus requests to hide from detection. In summary, viruses are classified into these 10 main types depending on their infection mechanisms and goals.
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1. The document discusses types of computer viruses, how they infect systems, and methods for detecting and preventing viral infections. It covers system/boot sector viruses, file viruses, macro viruses, polymorphic viruses, and others.
2. Detection methods discussed include scanning for virus signatures, integrity checking, interception, code emulation, and heuristic analysis. The document also lists countermeasures like installing antivirus software and regularly updating and running scans.
3. Real world examples of viruses are mentioned, like the "I LOVE YOU" virus from 2000 which spread through email attachments and caused major disruptions.
Pahdi yadav antivirus
Antivirus programs are an effective way to protect computers from viruses. They work by scanning files, memory, and storage media to identify and remove computer viruses. Antivirus software uses virus signatures or definitions of known virus code to identify viruses. It is important for users to regularly update their antivirus programs to download the latest virus definitions and protect against new viruses. While no methods can guarantee complete safety, installing and keeping updated antivirus software is an effective technique to safeguard computers and networks from viruses.
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This document discusses different types of computer viruses and provides tips to prevent viruses. It describes three main types of viruses: file infectors, boot sector viruses, and Trojan horse viruses. It notes that Windows XP deals with viruses more seriously and recommends using antivirus programs to protect systems. Two specific tips provided are to be careful with floppy disks which are a main virus source, and to exercise caution when downloading files from the internet. It also stresses the importance of keeping antivirus programs and virus libraries up-to-date, as over 100 new virus strains are released each month.
Computer viruses 911 computer support
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This document discusses the importance of using antivirus programs to protect computers and data from security risks like viruses. It explains that antivirus programs work by identifying and removing viruses from a computer's memory, storage, and incoming files. They also scan files downloaded from the web and email attachments for viruses. Antivirus programs rely on virus signatures and definitions to identify viruses, and it is important for users to regularly update these signatures to protect against new viruses. While no methods can completely guarantee safety, installing and properly using an antivirus program is an effective technique for safeguarding computers and networks from viruses.
Virus and Anti virus
This document discusses viruses and anti-viruses. It defines a computer virus as a small software program that spreads from computer to computer and interferes with operations. Viruses work by attaching themselves to other programs. An anti-virus is software that identifies and removes viruses and other malware. It examines files and compares them to virus definitions to detect infections. Common virus types include Trojans, boot sector viruses, and worms. Popular anti-virus software includes AVG, McAfee, and Norton, which regularly scan systems and delete any found viruses. The disadvantages of viruses are they can crash systems, delete files, slow computers down, and damage hardware. Anti-viruses provide protection from viruses and malware as well as
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Presentation on virus
ier, computer in education, dhaka university, educational technology, introduction to computer, bangladesh education , protik ray, education computer
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A computer virus is a program that spreads from one computer to another and interferes with computer operation. Viruses can corrupt or delete data. They replicate by attaching themselves to other programs or files. Common types include macro, polymorphic, and metamorphic viruses. Symptoms of a virus include slow performance, random restarts, and loss of disk space. Viruses are typically spread through email attachments, networks, removable media, and pirated software. People create viruses for fun, profit, or revenge, while info attackers aim to disrupt networks. To protect against viruses, users should install and regularly update antivirus software, avoid unknown emails/files, and use security measures like firewalls.
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Viruses are malicious programs that can replicate themselves and spread from computer to computer, sometimes causing damage. There are different types of viruses like boot viruses, polymorphic viruses, and macro viruses that use various infection methods. While viruses have existed since the late 1940s, the first widespread personal computer virus, Brain, emerged in 1986. Viruses aim to avoid detection by antivirus software which uses dictionary-based scanning and behavioral monitoring approaches.
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This document provides an outline for a presentation on computer viruses. It defines viruses and discusses their naming, types, examples, infection phases, and symptoms. It focuses specifically on Trojans, phishing sites, combating viruses with anti-viruses and firewalls, and safe computing practices. The outline covers virus history, definitions, major examples, and details on file, boot sector, macro, and multipartite viruses. It also explains symptoms of infection and strategies for prevention and recovery.
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A computer virus is a type of malicious software that replicates by inserting copies of itself into other computer programs, files or boot sectors. It can damage files or systems. The first computer viruses emerged in the early 1980s and have since affected many platforms. Viruses function by infecting files and replicating. They often exploit software bugs or user errors to spread. Common types include macro viruses, boot sector viruses and resident viruses. Viruses continue to evolve techniques to avoid detection. A brief history outlines some of the most famous early viruses from the 1970s-2010s like Brain, Jerusalem, ILOVEYOU, and Cryptolocker. Viruses spread via software vulnerabilities, social engineering, or by targeting common file types like documents
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A computer virus is a type of malicious software program that can copy itself and spread from one computer to another. Viruses often disguise themselves as legitimate programs or documents to infect users' computers without their knowledge. Once installed, viruses can damage programs, delete files, display unwanted messages, or slow computers by clogging memory. To avoid detection, viruses may kill antivirus tasks before scanning can occur. Antivirus software works by scanning files for known virus signatures and behaviors. It is important to keep antivirus software up to date, avoid opening suspicious email attachments, only download files from trusted sources, and back up files regularly to prevent virus damage.
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A computer virus is a type of malware that attaches to another program (like a document), which can replicate and spread after a person first runs it on their system. For instance, you could receive an email with a malicious attachment, open the file unknowingly, and then the computer virus runs on your computer.
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Computer viruses function similarly to biological viruses by spreading from computer to computer. They piggyback on programs and documents to execute themselves and then infect other files. Early computer viruses in the 1980s took advantage of the personal computer boom and file sharing through floppy disks to self-replicate. Common types included file infector viruses, boot sector viruses, and macro viruses. While early viruses primarily spread through infected files and boot sectors, modern email viruses like Melissa and ILOVEYOU spread by attaching to emails and infecting address books. Antivirus programs help detect and remove viruses but cannot guarantee full protection.
Team7.ppt
Computer viruses function similarly to biological viruses by spreading from computer to computer. They piggyback on programs and documents to execute themselves and then infect other files. Early computer viruses in the 1980s took advantage of the personal computer boom and file sharing through floppy disks to self-replicate. Common types included file infector viruses, boot sector viruses, and macro viruses. While early viruses primarily spread through infected files and boot sectors, modern email viruses like Melissa and ILOVEYOU spread by attaching to emails and infecting address books. Antivirus programs help detect and remove viruses but cannot guarantee full protection.
COMPUTER VIRUSES AND WORMS.pdf
Computer viruses and worms are malicious software programs that spread from computer to computer and interfere with operations. Viruses spread through email attachments and downloads, while worms replicate by exploiting security vulnerabilities to copy themselves to other systems on a network. Common types are executable viruses, boot sector viruses, and macro viruses like the damaging Melissa virus of 1999. Prevention methods include installing antivirus software, keeping systems updated, and using firewalls. Trojan viruses differ in that they do not self-replicate but perform unauthorized actions like deleting or blocking access to data when activated. The first major computer worm was the Morris worm of 1988, which disrupted many systems and led to the conviction of its creator.
Malicious software
Malicious Software,Terminology of malicious programme,Malicious programs,Nature of Viruses,Virus Operation-four phases or life cycle of virus,Virus Structure,Types of Viruses,Anti-Virus Software
Computer viruses
Computer viruses are programs that can copy themselves and infect computers without permission. True viruses spread when an infected computer is connected to another computer. There are different types of viruses like email viruses, Trojan horses, and worms. Viruses work by executing code and writing to memory when an infected program is launched. Some of the worst viruses in history include Melissa, ILOVEYOU, and MyDoom. People can prevent viruses by using protected operating systems, virus protection software, and avoiding unknown attachments or programs.
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.
Computer virus
Computer viruses are malicious software programs that can damage computers and spread without permission. Viruses are often transmitted by email attachments, downloaded files, removable drives, and through networks. They work by attaching themselves to other programs or files. To prevent virus infections, it is important to have up-to-date antivirus software installed and configured to run regularly, only open trusted email attachments, be careful when downloading files, and back up files frequently.
Virus
This document provides information about computer viruses including their components, how they spread, types of viruses, and prevention and treatment methods. It discusses how viruses replicate and attach themselves to other programs to spread from one computer to another. It also lists common antivirus software that can be installed to help prevent the spread of viruses and recommends regularly updating the software.
Virus and Worms
This document discusses viruses, worms, and other types of malware. It defines viruses and worms as replicating programs that can attach themselves to other programs or files to spread. Viruses can remain dormant until certain conditions are met before activating. The document outlines the life stages of viruses from design, replication, activation, detection, and incorporation into antivirus defenses. It discusses various types of viruses like encryption viruses, polymorphic viruses, and macro viruses. Motivations for creating viruses and common infection methods are explained. Finally, some famous viruses are described like Mydoom, Melissa, ILOVEU, Bubble Boy, and Blaster to illustrate how different viruses function and spread.
Computer virus
The document discusses computer viruses including what they are, why they are created, a brief history of viruses, types of viruses, and ways to prevent virus infections. It defines a computer virus as a program designed to harm infected computers. It then covers different types like macro, memory resident, overwrite, and direct action viruses. The document also discusses virus symptoms, notable viruses from the past, and recommends only downloading files from trusted sites and using antivirus software to prevent virus infections.
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Computer Viruses
- 1. viruses
- 4. The reasons that led to creating the viruses: the spread of personal computers the use of computer bulletin boards the floppy disk
- 5. Computer viruses are called viruses because they share some of the traits of biological viruses
- 6. Virus evolution: The tricks the virus creators learned: the ability to load viruses into memory the ability to infect the boot sector on floppy disks and hard disks
- 7. A wormis a computer program that has the ability to copy itself from machine to machine
- 8. for Protection: you should run a more secure operating system like UNIX. avoid programs from unknown sources make sure that Macro Virus Protection is enabled in all Microsoft applications never double-click on an e- mail attachment that contains an executable