there s two possible ways how is vipins problem meant:
once he turned game on and after few minutes playng its freezing-theres of course not enough ram
or(how i understood it is)
one day he played GTA, everything worked fine. then after a week he played it again and it was not smooth, in that case i have comment eagle of fire's post:
did you play GTA? graphics and enviroment there are almost same whole game
in that case i think he didnt format his hard drive well
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