BSOD frequently occurs(OS Version:6.1.7601.2.1.0.256.1)

I have a Dell Vostro, with integrated intel graphics and ati radeon 7650, core i5,Windows 7 64-bit Ultimate. Recently i have been introduced with a problem of the bluescreen, every time i turn on my laptop it works fine sometimes for hours but some times it crashes i am sure its a driver problem that is making the laptop crash but i am not sure which one it is please help me identify what is...



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