A '''computer virus''' is a kind of [[malw … A '''computer virus''' is a kind of [[malware]] that copies itself and can spread over several mediums, depending on the type. Many modern viruses have spread themselves over the [[internet]]. They are distinct from [[computer worm]]s in that they need to attach themselves to some form of executable code (such as a .COM file, a .EXE file, Word macros, etc.) in order to function. Computer viruses can spread through files, floppy disk boot sectors and hard disk master boot records, document macros, and other means.
Many file and macro viruses have been posted with infected files on [[bulletin board]]s and [[website]]s. Some multi-partite viruses (viruses that spread using more than one manner) such as [[Melissa]] have e-mailed themselves to other people. However boot sector viruses and companion viruses have not spread on the internet.
Many of these virus writers did it for the [[lulz]]; they wanted to see how far the program would spread, or they wanted to see how many computers to [[fubar]] and [[b&]] from the internets (by having their hard drives erased, of course :) ). their hard drives erased, of course :) ).