|Developer(s)||John Norstad at Northwestern University|
|Initial release||March 18, 1989|
|Operating system||Classic Mac OS|
Disinfectant was a popular antivirus software program for the classic Mac OS. It was originally released as freeware by John Norstad in the spring of 1989. Disinfectant featured a system extension that would detect virus infections and an application with which users could scan for and remove viruses. New versions of Disinfectant were subsequently released to detect additional viruses. Bob LeVitus praised and recommended Disinfectant in 1992. In May 1998, Norstad retired Disinfectant, citing the new danger posed by macro viruses, which Disinfectant did not detect, and the inability of a single individual to maintain a program that caught all of them.
- Norstad, John (1998-10-11). "Disinfectant Retired". Archived from the original on 2016-03-04. Retrieved 2016-04-06.
- Ducan, Geoff (1997-07-14). "Disinfectant 3.7.1". TidBITS. Retrieved 2016-04-06.
- Anbinder, Mark H. (1998-05-11). "John Norstad Retires Disinfectant". TidBITS. Retrieved 2016-04-06.
- Borrell, Jerry (1991-01-01). Macworld Read Me First Book. IDG Books. p. 219.
- LeVitus, Bob (1992). Dr. Macintosh's Guide to the On-Line Universe. Addison-Wesley. p. 270.
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