Different BSOD Every Time During Full Screen Video Playback

I've been using Vista Ultimate x64 for a couple weeks now and have since run into an irritatingly consistent BSOD occurrences.

Whenever I've watched a video file (avi, mkv so far) in Vista x64, maybe 15-30 minutes in each time, my computer does this hyper-repeating glitch thing with the video and audio then quickly goes to BSOD and restarts (I'm using KMPlayer, BTW). I've only noticed this when watching videos, and it seems to happen when in full-screen mode. I have a 9800 GTX running the latest Nvidia x64 drivers, which from the bit of research I've done, appears to be a regular troublemaker.

The thing that throws me is that when I look at the minidump, the "probably caused by" is different each time. I've seen usbhub.sys, cmudaxp.sys (HT Omega Claro Plus sound card), ntoskrnl.sys, and win32k.sys thus far, and I don't know what they have in common or if they're relevant if it's a video driver issue.

System info: Intel Q9450, Asus P5E3, 4GB DDR3-1600 RAM, HT Omega Claro Plus sound card, EVGA 9800 GTX.

Any help is much appreciated!

Hi gescom,
Welcome to the forums.
What happens if you try a different player like Windows Media Player or GOM Player or etc?
Raj

Well, now I think it's not just isolated to video playback now. Just a minute ago I got another BSOD when I just had Firefox open and iTunes playing. Maybe it's a problem with the audio driver? This time the minidump blamed ntoskrnl.exe ( nt+55390 ).

OK, I just experienced another BSOD; this time while only using Firefox, no sound or anything. FF crashed with 3 tabs open (eBay, Gmail, Cnet), and as soon as restart it and click restore tabs it goes to BSOD. The minidump blame is win32k.sys ( win32k+c54d4 ).

This is becoming unacceptable. I really don't care to move back to XP, but if this keeps up, I probably will (I can't even remember the last time I got a BSOD in XP).

And now another BSOD. Windows popped up an Event Logger svchost crash. I close that and the next move I make (click a button, open a program) gives me a BSOD.

The minidump blame is tcpip.sys ( tcpip+75774 ).