[jeffgrant]

Originally Posted by masraum

I'm in favor of the occasional clean sweep, but it's not 100% necessary to get rid of a virus/trojan/ad-malware.

In some cases, it is.

And for that matter, a clean sweep doesn't always work.

You might find this an interesting read: http://threatpost.com/blogs/researchers-unveil-persistent-bios-attack-methods