I think that you got some work in you computer that infected most of files.
Burn som antivirus on the CD and run it from it.
sophos has "sav32cli" that you can put on CD
http://www.sophos.com/support/knowle...cle/13251.html
and Dr.Web has CureIt
http://freedrweb.com/cureit/ -

Use other computer to download and burn files on CD.