Windows System Assessment Tool has stopped working

I recently installed a new GPU,

http://tinyurl.com/led7tyy

and I have gotten this message twice in just over a week. The GPU seems to be working fine. How do I fix this program from crashing? I'm running Windows 7 Home Premium 64-bit.

Have you done a complete removal and reinstall of your drivers? Lookup display driver uninstaller. Would link but I'm on mobile.

I believe that may have fixed the problem. I was able to run the Windows Experience Index without the error message popping up. Thanks for the help. :)