Hopefully you don't have a bad card. Put the old card back in, reboot and run CCleaner. (the generic driver should allow you to change rez if it bothers you) Have it do the Clean and Registry portions both. You may have to run it more than once if your system is badly messed up. When it can't find anymore registry errors to fix, you're done.
Then download and install Driver Sweeper: http://www.techspot.com/downloads/4266-driver-sweeper.html
Boot to safe mode (tap f8 at boot), run DS, and have it remove any AMD, ATI, & Nvidia GRAPHIC driver remnants it can find. Shut down and install the new card. See if you can now boot to Win7.
Yes. Although I'm surprised it doesn't boot to windows anyway. But let's do that first. It's the correct way to do it...
With the old card back in, boot to windows, uninstall the driver, (it will ask to reboot), just shut down instead. Change cards and see if it will boot back to windows and load a generic driver. If so, install the new Nvidia driver. If all is well, run CCleaner to clean up junk files and registry errors: https://www.piriform.com/ccleaner
Hopefully you don't have a bad card. Put the old card back in, reboot and run CCleaner. (the generic driver should allow you to change rez if it bothers you) Have it do the Clean and Registry portions both. You may have to run it more than once if your system is badly messed up. When it can't find anymore registry errors to fix, you're done.
Then download and install Driver Sweeper: http://www.techspot.com/downloads/4266-driver-sweeper.html
Boot to safe mode (tap f8 at boot), run DS, and have it remove any AMD, ATI, & Nvidia GRAPHIC driver remnants it can find. Shut down and install the new card. See if you can now boot to Win7.