To new and existing users (see also error message below): The utility has been discontinued because as of June 2nd, 2008, Frisk Software, the makers of F-PROT are no longer providing updates to the virus definitions for the 3.x versions of F-PROT (that includes the DOS version). Read their announcement at http://www.f-prot.com/news/gen_news/080602_version3.html.
If you have received an error message different from "A downloaded update for F-PROT for DOS is corrupt and could not be applied", please contact us.
For any past or present questions or concerns regarding the utility, please do not hesitate to contact us via this web site. We continue providing post-discontinuation support, i.e. if you need help removing the utility, or anything else related to it.