FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -A Virus is a self-replicating code segment which must be attached to a host executable. When the host is executed, the virus code may also execute. If possible, the virus will replicate by attaching a copy of itself to another executable.

Detailed explanation-2: -A computer virus is a kind of malicious computer program, which when executed, replicates itself and inserts its own code. When the replication is done, this code infects the other files and program present on your system.

Detailed explanation-3: -Definition(s): A computer program that can copy itself and infect a computer without permission or knowledge of the user. A virus might corrupt or delete data on a computer, use e-mail programs to spread itself to other computers, or even erase everything on a hard disk. See malicious code.

Detailed explanation-4: -Definition: A computer virus is a malicious software program loaded onto a user’s computer without the user’s knowledge and performs malicious actions. Description: The term ‘computer virus’ was first formally defined by Fred Cohen in 1983.