Try Carol's advice in the post below;
http://forums.cnet.com/7726-6132_102-5147396.html

Note, the FULL discussion she posted in is available by clicking the "Click here" option above her post subject title.

Use the link to the guidance she has provided and follow that guidance as closely as possible.

This is a known malware problem and it might be necessary to repeat the steps a few times to remove all the malware and the effects of the malware. Note, when RKill is used, do not reboot but run the other anti-malware scanners immediately.

Good luck and I hope you get it sorted.

Mark