Presentation on Computer Virus

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Presentation transcript:

Presentation on Computer Virus SUBMITTED BY: MOHD GHALIB UPS NANDI FIROZPUR

COMPUTER VIRUS

What is computer virus? Computer virus refers to a program which damages computer systems and/or destroys or erases data files. One of the first detected virus was the Creeper virus in the early 70’s.

Types of Computer Virus Time Bomb Logical Bomb Worm Boot Sector Virus Macros Virus Script Virus Trojan Horse

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.

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.

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.

Trojan Horse Trojan Horse is a destructive program. It usually pretends as computer games or application software. If executed, computer system will be damaged.

Symptoms of Infection Programs take longer to load than normal. Strange sounds or beeping noises come from the computer. Strange graphics are displayed on your computer monitor Unable to access the hard drive when booting from the floppy drive. Program sizes keep changing.

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. Empty floppy drives of diskettes before turning off computers, especially laptops. 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. Install security updates for your operating system and programs as soon as possible.

THANK YOU