Hi!
Got fed up with software finding trojans and saying they can't remove them. Also got fed up with having a PC that got slower and slower.
Eventualy found eScan Antivirus for Windows free download. Now no viruses or trojans and still a fast PC (1 desktop AMD and 1 laptop P4).
http://www.mwti.net
After 30 day trial, I paid about ?13 for a year licence.
Now I don't use a firewall - slows PC's too much.
Hope it helps,
Bloke