Elusive Computer Bugs

I'm having this relatively elusive, but rather annoying crash with my HTPC. Every few days it doesn't just crash, but it actually blue-screens. I sent a crash report into Microsoft, and it came back as an "unknown driver" conflict.

So far, I've reinstalled the drivers for both TV cards (a Hauppauge PVR-150 and Divco Fusion5 USB HDTV tuner; both highly recommended) and the video drivers, to no avail. I even turned off AMD Cool n' Quiet, thinking maybe that'd do it, but no dice. It's really annoying, because I end up missing recording times. Nothing important, but still.

The Divco tuner is really nice though; found out the other day that despite only having basic analog cable, I can pick up NESN HD with it. Gonna have to watch the Sox in HD tonight ^_^

Any suggestions would be appreciated. I'll probably try reinstalling the chipset and audio drivers at some point, if not tonight. Stupid Windows XP; probably wouldn't have this problem with a Mac, although I would have spent like 2x as much once you figure in tuners. Oh well.

Configuration: Antec Sonata II | MSI K8NGM2-FID | Athlon 64 X2 3800+ | NEC 3550A | WD Caviar SE 320Gb PATA | Hauppauge PVR 150 | Divco FusionHDTV 5 Gold USB | Mitsubishi WD-52327 HDTV