http://forums.cnet.com/5208-4_102-0.html?forumID=44&threadID=291330&messageID=2750584
I had malware that replaced site ads with something else... No scanner of mine would work (malwarebytes, McAfee and Windows Defender). If you try MalwareBytes and Windows Defender and they find something but won't delete it try something called ComboFix... It's the only one that actually worked for me. Worth a shot.
Frank.

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