Trend's Sysclean.exe
 

Everyone should keep a copy of this program on their hard drive and keep it updated, as to the pattern file, as often as possible. This is the only complete DOS based anti-virus program, that I am aware of only...and therefore can be accessed from all states of rebooting...at the command prompt with admin privilieges, or run it from your desktop in a command prompt...

TTFN...