It is a very rare problem, I had never heard something like that... I don't think it's a hardware or malware problem, I think that it was by a registry edit that went wrong. Try this: Runs a command prompt with administrator privileges. Start Menu > All Programs > Accessories > Command Prompt (right click, run as administrator, Yes) writes "sfc /scannow" (without the quotes) and wait untill the proces is completed (a few minutes)
The System File Checker (sfc) is a utility in Microsoft Windows that allows users to scan for and restore corruptions in Windows system files...
Remember that you can paste text in the Command Prompt, by clicking on the program's icon > edit > paste
sfc /scannow
I hope it has helped you...