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When we have a malware infection, we like to:
Here are our go-to scanners available for free download.
http://www.bitdefender.com/scanner/online/free.html
http://www.eset.com/us/online-scanner/
http://www.malwarebytes.org/mwb-download/
The first two are on-line scanners and don't get installed on your PC (perfect!).
The last one gets installed, but it's only an on-demand scanner. You can uninstall it after you're done or leave it installed for next time. It doesn't use any resources unless it's running.
Please run full scans with at least two of these.
Please let us know ASAP what you found.
Oftentimes, we have to temporarily disable your e-mail account if your infected PC was spamming others. Once we hear back from you that your PC has been cleaned, we can re-enable your account and request our server be taken off of any blacklists you migh have gotten us on.
MalwareBytes Free version is:
These links are for the standard Malware cleaner and a root kit variation.