Since last weak after 10 -15 minutes my PC automatically crashes and sudden black sceen comes and after that when i push my Numlock key to check whether the PC responds or not but the Numlock key does not show any response.
I have also format my pc and changed it to windows 7 original Microsoft version, but now also nothing happens and the problem continues.
My pc configuration
Intel core 2 duo 2ghz,
Intel original DG41RQ motherboard,
Windows 7 original,
Nvidia 9600gt 1gb (Graphic Card),
Realtek digital output (HD integrated sound card),
hdd 500gb Segate (Sata)
Please reply as soon as possible
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