|I had a similar problem a month ago. From my files, though not from from my browser, I was able to download a number of programs that might deal with this problem, i.e.Norton, Symantec, Webroot, Emsisoft, Avast short scans. Result: short scans were useless in eliminating the problem. Two that I found effective, however, were Avast Long scan: nearly three hours) and Microsoft's Malicious Software Removal Tool (nearly eight hours)|
http://www.techsupportalert.com/ website was found very useful.