How can I fix my BAD_POOL_CALLER Error???

My desktop is an HP m7750n, which I recently did a clean install of Windows 7. I updated the audio drivers and installed the current windows 7 nvidia driver for my graphics card. The version of Windows 7 I installed was the 64 bit. I get the BAD-POOL-CALLER error usually during times when I am running my mmo and comes up with the following message:

A problem has been detected and windows has been shut down to precent damage to your computer.

BAD-POOL-CALLER

If this is the first time you’re seen this stop error screen , restart your computer.if this screen appears again, follow these steps:

Check to make sure any new hardware or sofeware is properly installed . if this is a new installation , ask your hardware or sofeware manufcturer for any windows updates you might need.

If problems continue ,disable or remove any newly installed hardware or software,disable BIOS memory options such as cashing or shadowing. If you need to use safe made to remove or disable components. Restart your computer, press F8 to select advanced startup options , and then select safe mode.

Technicial information:

Stop:0x000000C2 (0x0000007, 0x00000CD4, 0x84F0AA18, 0x8505D540)

Beginning dump of physical memory

Physical memory dump complete contact your system administrator or technical support group for futher assistance..

Please help me solve this issue. thanks!!