Oblivion

So my computer keeps randomly shutting down and if the screen saver comes on then its freezes and when i turn windows back on it says it recovered from a fatal error and then when i send the error report this is what it comes up with

Error type Windows stop error (A message appears on a blue screen with error code information)
Solution available? Yes
What does this error mean? You received this message because a device driver installed on your computer caused the Windows operating system to stop unexpectedly. This type of error is referred to as a "stop error." A stop error requires you to restart your computer.
Cause A video adapter device driver
Computer symptoms A message appears on a blue screen with error code information:

STOP 0x000000EA THREAD_STUCK_IN_DEVICE_DRIVER
- or -
STOP: 0x100000EA THREAD_STUCK_IN_DEVICE_DRIVER_M


What does thread stuck in device driver mean???

what should i update?
if its a driver thing i have an EVGA 7800GT

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Case: Lian Li 65B
Hard Drive: Western Digital Raptor
Processor: AMD Athlon 3800+
Motherboard: DFI Lanparty
Video Card: eVGA Nvidia 7800 GT
Screen: 19"
RAM: 2 GB
Mouse: Logitech MX518
Keyboard: Logitech G15
PSU: Asys 650W