Dell India — Graphic card

Address:

500010

I bought new laptop year a back . when i got this product itwas good but after some day i started i getting problem it was stucking and hanging and too slow I bought laptop and i thought graphics are working but its not working.
when i play games like nfs other games.And some videos are also not played properly .
i tried everything
I dont know what to do and this problem was facing when i bought this new also
plz tell me what should i do