Quote from http://www.f-prot.com/support/dos/dos_index.html

Please note that there is a problem with running a DOS antivirus scanner on Windows NT 4.0 / 2000 / 2003 / XP systems. It is not guaranteed that all files will be scanned. The reason for this has mainly to do with long filenames and non-ASCII characters in file names. DOS only “understands” 8 character long filenames.

Therefore use F-Prot Antivirus for Windows to scan Windows NT 4.0 / 2000 / 2003 / XP systems.

Therefore use F-Prot Antivirus for Windows to scan Windows NT 4.0 / 2000 / 2003 / XP systems.

I am using Windows XP, so f-prot for MS-DOS doesn’t work on it, does it?