Spybot - Search & Destroy 1.2
CWShredder
Both those programs have update features so make sure you
update them before scanning with them...every time you use
them.
CWShredder is simple...update check then click "Fix"
Spybot has a wee-bit more to it, update check then click
"Search & Destroy" (top left) then click "Check for problems"
(bottom left). When it's done scanning bad stuff will already be
checkmarked so all you have to do is click "Fix selected problems".