It could be smitfraud
Turn off System Restore
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Download Malwarebytes Anti-Malware.
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http://download.bleepingcomputer.com/malwarebytes/mbam-setup.exe
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* Double-click mbam-setup.exe and follow the prompts to install the program.<br>
* At the end, be sure a checkmark is placed next to Update Malwarebytes' Anti-Malware and Launch Malwarebytes' Anti-Malware, then click Finish.<br>
* If an update is found, it will download and install the latest version.<br>
* Once the program has loaded, select Perform Quick Scan, then click Scan.<br>
* When the scan is complete, click OK, then Show Results to view the results.<br>
* Be sure that everything is checked, and click Remove Selected.<br>
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I would keep scanning with it until it is clean by closing out and rebooting and running it again.
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Just to be on the safe side when you finish do an online scan with Bitdefender.
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http://www.bitdefender.com/scan8/ie.html
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Get yourself a good Antivirus program. I have been using Avast which is free for home use, you only have to register it.
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Remember to turn on System Restore when you have finished cleaning.
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IE error res://C:\WINDOWS\system32\shdoclc.dll/navcancl.htm
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