Virus

WHAT IS A VIRUS?

A computer virus, is a small program (or code) written to alter the way a computer operates, without the permission or knowledge of the user. A virus must meet two criteria:
•It must executable itself: It will often place its own code in the path of execution of another program
• It must replicate itself: For example, it may replace other executable files with a copy ofthe virus infected file.

WHAT DAMAGE CAN MAKE A VIRUS TO MY SYSTEM?

The common objectives of the virus are the vital areas of the system, such as:
• the memory
• boot sector
• the Table ofPartitions of the called disc Master Boot Record
Depending on the type of virus

Software

• Modification of programs so that they let work
• Modification of programs so that they workerroneously
• Modification on the data
• Elimination of programs and/or data
• To end the free space in the rigid disk
• To cause that the system works slowly but
• Robbery of confidential informationHardware

• Erasure of the BIOS.
• Burned of the processor by false information of the temperature sensor.
• Breakage of the rigid disk when doing to repeatedly read it specific sectors that forcetheir mechanical operation.

TYPES OF VIRUS

File infector viruses: File infector viruses infect program files. These viruses normally infect executable code, such as .com and .exe files. Theycan infect other files when an infected program is run from floppy, hard drive, or from the network.

Boot sector viruses: These viruses infect floppy and hard drives. The virus program will loadfirst, before the operating system.

Macro Virus: This is a new type of virus that uses an application’s own macro programming feature to distribute themselves. Unlike other viruses, macro viruses donot infect programs; they infect documents.

Virus Hoax: Although there are thousands of viruses discovered each year, there are still some that only exist in the imaginations of the public and the...