As computer virus
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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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As computer virus
- 1. Created by Dragon Lee May-2003
- 3. What is computer virus? Computer virus refers to a program which damages computer systems and/or destroys or erases data files
- 4. Features of Computer Virus
- 5. Types of Computer Virus Time Bomb Logical Bomb Worm Boot Sector Virus Macros Virus Trojan Horse Script Virus
- 6. Time Bomb A time bomb is a virus program that performs an activity on a particular date
- 7. Logical Bomb A logical bomb is a destructive program that performs an activity when a certain action has occurred.
- 8. 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
- 9. 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
- 10. 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
- 11. Script Virus Commonly found script viruses are written using the Visual Basic Scripting edition (VBS) and the JavaScript programming languages
- 12. Trojan Horse Trojan Horse is a destructive program. It usually pretends as computer games or application software. If executed, computer system will be damaged.
- 13. Trojan Horse Trojan Horse usually comes with monitoring tools and key loggers
- 14. 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
- 15. Actions to prevent virus infection Don't share Drive C: without a password and without read-only restrictions. Empty floppy drives of diskettes before turning on computers, especially laptops.
- 16. Actions to prevent virus infection Forget opening unexpected e-mail attachments, even if they're from friends Get trained on your computer's anti-virus software and use it. Have multiple backups of important files. This lowers the chance that all are infected.
- 17. Actions to prevent virus infection 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.