There have been a number of issues reported experiencing Blue Screen Of Death (BSOD) crash on Vista and Windows 7 related to dxgmms1.sys and nvlddmkm.sys files. There are few solutions available and all of them are not 100% guarantee to fix your problem :-\
Please specify solution that worked for you in the comments below.
Try installing Windows hot-fix http://support.microsoft.com/kb/974431
nvidia drivers may cause BSOD, try running the straight up vista/windows 7 drivers
There might be a bad memory or other piece of hardware. Run the built-in Memory Diagnostic or other diagnostic tools to find any potential problems.
- Disable C1E in BIOS
- Disable any boost in BIOS (standard only)
- Run driver sweeper in safe mode to uninstall display drivers
- Install newest video drivers and update directx
Please let me know if you are aware of any other solutions for fixing this problem
P.S. There is a relevant post on the forum: BSOD – dxgmms1.sys
And here is an epic Microsoft fail video demonstrating Blue Screen of Death