monu_08 :
here new drivers http://www.nvidia.in/object/win8-win7-winvista-32bit-306.02-beta-driver-in.html
thx monu or i ill say manish if i am right thx for your support it was't the driver issue
when i tried to install drivers you recomended same erroor shoed up but thn i think of something that my dvi cable was able to output the diaplay data witch mens mobo and gfx are working perfebly so then i knew it is only my windows problem
now what i did is to run the setup as administrator that way driver will have it way to find gfx and it WORKED
thx for all your support manish