Setting the scene
Personal computers spread through offices and homes in the 1980s, and prank programs like the Elk Cloner and Brain virus showed that malicious code could travel on floppy disks.
What happened
Bernd Fix released a removal tool for the Vienna virus around 1987, while companies including McAfee and Symantec began selling commercial scanners that same era.
Why it still matters
Antivirus software became a standard layer of PC security and later evolved into broader endpoint protection suites. Memorable detail: the Brain virus, written in Pakistan, displayed contact information for its authors rather than destroying data.
Background
Malware defense became a software category.