sajoria,
i got 2 applications that you can run and tell ya what the problem is

first: PassMark BurnInTest software - PC Reliability and Load Testing
second: Futuremark - Download
(trial versions for both are fine unless ya have money to buy full versions)

on the first one go to select test and chose CPU, ram, video, 2 d and 3 d graphics set every thing to max CLOSE ALL APPLICATIONS!!!!!!! NOTING MUST BE RUNNING IN THE BACKGROUND NO INTERNET OR GAMES NOTHING BUT YOUR DESKTOP ** VERY IMPORTANT CAUSE IT WILL MAX EVERYTHING ON YOUR COMPUTER OUT FOR THE TEST**
it will run for bout 30 mins and don't fuck with your computer during that time


the second test open application make sure everything is correct in fields for your computer ans as above CLOSE ALL APPLICATIONS!!!
than start test but this time sit there and watch the show for and video errors or problems there's 2 test on there that bypasses your video card and run strictly off your CPU these two test will run slow no matter how good your computer is so don't pay attention to them but all the others watch for video problems


if ya get a fail on any part of test on first it will telll you where problem lyes
the second one ya mostly have to catch the errors yourself

let me know what ya get
and your welcome
KAMI