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12 Nov 2012  
NoelDP

Microsoft Community Contributor Award Recipient

Win 7 x64 Home Premium (and x86 VirtualBox VM)
 
 

There are too many posibilities at this point - possibly hardware failure, malware, bad applications such as registry cleaners.... the list goes on.
Certainly, it sounds as if it's time for a reinstall, if yu've not done so since your prior thread.
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