In Germany, Tjark Auerbach founded Avira (H BEDV at the time) and released the first version of Anti Vir (named "Luke Filewalker" at the time). Vesselin Bontchev released his first freeware antivirus program (he later joined FRISK Software).Also Frans Veldman released the first version of Thunder Byte Antivirus, also known as TBAV (he sold his company to Norman Safeground in 1998).
In Hungary, the security researcher Péter Szőr released the first version of Pasteur antivirus.
In the meanwhile, in United States, Symantec (founded by Gary Hendrix in 1982) launched its first Symantec antivirus for Macintosh (SAM).
SAM 2.0, released March 1990, incorporated technology allowing users to easily update SAM to intercept and eliminate new viruses, including many that didn't exist at the time of the program's release.
Before internet connectivity was widespread, computer viruses were typically spread by infected floppy disks.
Antivirus software came into use, but was updated relatively infrequently.
During this time, virus checkers essentially had to check executable files and the boot sectors of floppy disks and hard disks.