I had an serious infection of Trojans (vundo) that Symantec, Norton, and Windows Defender could not see (and therefore could not remove). I have gotten rid of almost everything with Windows Live OneCare but still have some annoying pop-ups that I have researched only to find they too are malware. I have all of the suggested Add-ons that Dmitri suggested but need another program. I have seen Malwarebytes Anti-Malware 1.40 as a good program that just so happens to be free and wanted to see if anyone had any experience with this program. I wouldn't mind so much if the pop ups were just the ads I've been seeing but this morning there were semi-porn pictures on the ad so this is now an emergency. Thanks!!