Click Computer Services

One possible cause of this error is a rootkit virus. I recently had a customer who had this error, along with other symptoms like a hijacked browser and a pop up window that would shut down the PC after about 5 - 10 minutes of use.

Malwarebyte's Anti-Malware did not find any spyware, even after doing a full scan. I checked msconfig, regedit, and HijackThis -- all turned up clean.

I decided to run ComboFix and it turned up a rootkit virus that had infected atapi.sys. Once Combofix disinfected the file the problems were resolved.

http://www.combofix.org/download.php

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