I think there is some problem in my ram.I tried one software from simmtester and it was showing failed after checking.

I dont know how to use memtest86.Devil bata yaar kaise cd write karu iski.
Krazy_About_Technology said:
Its something to do with your hardware dude. Check your HDD and cables, and graphics, specially if you are using onboard one. These really suck! After full reinstall, there is nothing wrong with Windows i think. Some people here can't bear that a single thread goes out clean
HDD,cables and gfx are ok.But i think ram mein koi problem hai.