Viruses are programs that can damage or corrupt computer systems in various ways, such as program viruses, boot viruses, and network viruses. Common virus types include Trojans, worms, and Wdll32. Antivirus software protects systems from virus infections by providing security from malicious programs. However, retroviruses can corrupt or damage antivirus programs. Popular antivirus companies mentioned include Norton, MacAfee, Quick heal, Kaspersky, AVG, Avast, Avira, Escan, and K7.

1. Virus and antivirus
Prepared by Prem Sahu

2. Virus
Vital Information Recourse Under Siege is a program which is used to destroy or
damage or corrupt the computer system according to their functionality
Different Type of Virus
Program Virus
Boot Virus
Network Virus
Different Virus name
Trojan
Worm
Wdll32

3. Antivirus
It is program which is used to protect from Virus and their infection
It provides security to our system from malicious program and their infection.
Retrovirus
It is malicious program which corrupt or damage the
antivirus of system.

4. Antivirus Company
Norton
MacAfee
Quick heal
Kaspersky
AVG
Avast
Avira
Escan
K7