This seems like a critical virus infection , it would be best to contact our virus removal experts from here so as they remote inn to your PC and clean the virus off your infected system, which is a paid support . If they can’t the money would be refunded .
Could you please let us know if you had performed a system restore in the PC ?
Let us know since when you have this error !
What is the operating system in the affected PC ?
Also run the McAfee virtual technician from here : http://mvt.mcafee.com and let us know your session id :