I'd recommend installing Webroot's Spy Sweeper software.
You can do a Free Online Scan on this link:
http://www.webroot.com/services/spyaudit_03.htm
You can get the trial software on this link:
http://www.webroot.com/consumer/products/spysweeper/
It's the only software I've found that nailed every adware program that got installed on my son's pc. He had 5 that seemed indestructible until I put Spy Sweeper on them.
It also has a built in shield that stops browser hijacking, prevents modifications of your hosts file, blocking of unauthorized programs into your root mem, stops entry of alt data streams, blocks messenger insertions, protects the startup registry, and has over 108,203 fingerprint defs of all the bad guys out there.