That worked...
 

Glad I was able to help. You can search for my other posts and compare your FPS. I stayed with an older driver as it was the most stable and no FPS penalty.

Keep us posted.

I struggled with this NVLDDMKM and OpenGL Error 14 bug for 3 days after getting a new PC until I found this thread.
The HOTFIX below as suggested by Skoshi Tiger fixed it for me.

http://support.microsoft.com/kb/953186

GTX295 (185.5 Drivers)
VISTA 64 SP1

See Edit

Vista service pack 1 fixed my NVLDDMKM has stopped responding errors.

http://support.microsoft.com/kb/935791



Edit:

After 4 days of running great before I posted here, I got the NVLDDMKM has stopped responding error after 20 mins of flight today. !!!!!!