Malwarebytes(spyware/malware) kaspersky(antivirus), extra firefox security add-ons (more spyware/malware protection)
with linux thats bootable from within windows / a serperate linux partition just in case

best security though is just keeping all your data backed up as well as safe guarded.
and always have a bootable live linux disk laying around somewhere, just in case.
This post was edited by WWumpscut on Jan 5 2010 04:41pm