PC virus celebrates 20th birthday

Analysis Today, 19 January is the 20th anniversary for the appearanceof the first PC virus. Brain, a boot sector virus, was let loose inJanuary 1986. Brain spread via infected floppy disks and was arelatively innocuous nuisance in contrast with modern Trojan, rootkitsand other malware. The appearance of the first Windows malwarenonetheless set in train a chain of events that led up to