Try >
Nod32 - Free Virus Scan: Use ESET's Online Antivirus Scanner
It's safe.
It works.
It also removes/repairs.
You do not need to do anything to any of your existing a-v apps.
Free.
nod32 is probably the best anti-virus tool around
today.
The free sacn and fix obviously doesn't protect you but it finds more crap than anything else now in the public market.
If you've got a problem it will 98% sure find and fix it.