Computer Virus by Neeraj Bhandari ( Surkhet.Nepal )


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Computer Virus by Neeraj Bhandari ( Surkhet.Nepal )

  2. 2. What is computer virus? Computer virus refers to a program which damages computer systems and/or destroys or erases data files.
  3. 3. Types of Computer Virus • Boot SectorVirus • Program virus • Macro viruses
  4. 4. Boot Sector Virus  This type of virus affects the boot sector of a hard disk.  This is a crucial part of the disk, in which information of the disk itself is stored along with a program that makes it possible to boot (start) the computer from the disk.
  5. 5. Program virus  These viruses infects program files which have extensions such as .COM,.EXE,.SYS,.DLL,.OVL or.SCR .  Program files are attractive targets for computer virus because they are widely used and have relativity ,simple formats to which viruses can attach themselves.
  6. 6. Macro viruses  Macro viruses as the name implies, will infect files of programs that use macros in the program itself.The most common of these are the Microsoft Office files created in Excel spreadsheets, Word documents, Access databases, PowerPoint presentations and these type of files from AmiPro and Corel Draw and others.
  7. 7. What a computer virus do?  A virus tries to take control of computer system it has infected at the first opportunity available.  It makes copies of itself and also try to carry harmful task written in its program.  This process can happen so quickly that the user is not even aware of the presence of a virus in his/her computer.
  8. 8. Best antivirus software  Norton antivirus.  McAfee virus scan  Kaspersky antivirus  Avast Antivirus  Panda Cloud Antivirus  Avira Antivirus
  9. 9. Norton antivirus  Norton antivirus is a product of Symantec corporation founded in 1982.  Norton check the following program • Boot records • Programs(at the time you used them) • All local hard drives, • Files download from internet, • USBs (when in use)
  10. 10. MacAfee virus scan  McAfee Inc. is an antivirus software headquartered in Santa Clara, California.  The company was founded in 1987 as McAfee Associates, named for its founder John McAfee who resigned from the company in 1994.  In February 28, 2011, McAfee is wholly owned subsidiary of Intel.
  11. 11. Kaspersky antivirus  KasperskyAnti-Virus is an antivirus program developed by Kaspersky Lab  It is designed to protect user from malware and is primarily designed for computers running Microsoft Windows and Mac OS X  KasperskyAnti-Virus features include real- time protection, detection and removal of viruses,trojans,worms
  12. 12. Avast Antivirus  Avast is a freemium antivirus computer program available to Microsoft Windows, Mac OS X and Linux users, with a user interface available in 41 languages.  AVAST Software has headquartered in Prague, Czech Republic, with offices in Linz, Austria, Germany and San Mateo, California
  13. 13. Panda Cloud Antivirus  Panda Cloud Antivirus is antivirus software by Panda Security which are available in a free and a paid version  According to Panda Security, Panda Cloud Antivirus is able to detect viruses,Trojans, worms, spyware, dialers, hacking tools, jokes and other security risks.
  14. 14. Avira Antivirus  Over 100 million customers,Avira is considered the sixth largest antivirus vendor worldwide.  Avira periodically "cleans out" the virus definition files, by replacing specific signatures with generic ones, resulting in a general increase in performance and scanning speed.
  15. 15. Presented by: Neeraj Bhandari Kishan Sarraf