Reformat.
/fp
No it won't but its easy to install your graphic card again. when you bought it did you get a box with install disk for the graphic cards? if not just google your graphic card, find the right model and download the driver for it.
Pretty simple, go to DxDiag and send me pictures of general and sounds and graphics. I can help you.
Another question, what's your operating system?
I'm already helping him guys.
Reinstall windows.