system
5
Hi,
a search for REVOP yields at least ten hits, one of them giving you the link (by raman) to descriptions:
http://www.virusbtn.com/resources/vgrep/vgrep.cgi?terms=revop&product=0
you get into SafeMode by pressing F8 continuously while the PC is booting
(or holding the shift key on W9x ) 