I have a 2nd gen intel sandy bridge integrated and a discrete nvidia gt520 gpu in my desktop.
I have windows 7 and ubuntu13.04 installed
I want to disable the nvidia discrete graphics in ubuntu but i need it running in windows7

lubin@dietcoke:~$ lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)
01:00.0 VGA compatible controller: NVIDIA Corporation GF119 [GeForce GT 520] (rev a1)

Please let me know the series of commands to be able to do so.