Big square ads appear in lower right corner of both IE and Chrome

Posted by BrianK on Super User See other posts from Super User or by BrianK
Published on 2012-05-30T12:06:06Z Indexed on 2012/10/06 3:40 UTC
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malware

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malware-removal

In both IE and Chrome, large ads appear in the lower right corner of the browser window. Sometime they look reputable like for Microsoft, but sometimes they are big flashing boxes that say "You have won". Right now I am looking at "Need to lose 30 lbs?" I ran Microsofot Security Essentials and it didn't find anything. I then ran Windows Defender Offline (boot from CD). WDO found five things lincluding browser hijack that caused the wrong page to appear after clicking a link. It reported that it cleaned successfully, after which I ran a quick scan to confirm. After rebooting I still see the ads. Do I still have an infection? Any other tools to try? What about ComboFix? Thanks

Update: Here's a screenshot - on superuser

I'm a winner!

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