You're going to have to uninstall any and all video drivers
and start over. You can't install one video card driver on top of another. That never works, especially when switching brands.
1) Go to Start > Control Panel > Add/Remove Programs and look for the drivers for both your old graphics and for your new Nvidia card. Remove them both
, but don't restart when prompted yet.
2) Go to Start > My Computer > View System Information > Hardware > Device Manager > Display Adapters and double-click the integrated graphics entry. At the bottom of the Properties window that comes up you will have a choice between "Use this device (enable)" and "Do not use this device (disable)". Choose the latter option (disable), click "OK", and then exit Device Manager and Click "OK" on the System Properties window.
3) Now restart, but enter your BIOS setup screen before Windows starts to boot, disable the integrated graphics there and exit the BIOS setup screen.
4) You should now be able to boot into Windows, install the Nvidia drivers and reboot.
If you still have any problems after this, just post 'em.
"They should rename the team to the Washington Government Sucks. Put Obama on the helmet. Line the entire walls of the stadium with the actual text of the ACA.
Fix their home team score on the board to the debt clock, they can win every game 17,000,000,000,000 to 24. Losing team gets taxed by the IRS 100%, then droned."