For quite some time we've had a Core 2 Duo machine acting up. It gives me BSOD at random. Nothing in particular seems to trigger it. It'll often freeze up on the internet as well from time to time on sites like Hulu. When it does this a loud buzz comes from the speaker and the screen just freezes completely instead of giving me a BSOD. I've run stress tests on the GPU and RAM and all temps are normal on the system. I'm starting to suspect the MOBO itself. These are the system specs. http://dl.dropbox.com/u/6392841/PCSpecs.pdf It's running Windows 7 x64 Pro now. And the minidumps http://dl.dropbox.com/u/6392841/CrashDumps.zip For the first year it was fine, running Windows Vista. We did an upgrade to Win7 and that's when the problems started. I've since blanked it and done a fresh install 3 times and the BSOD problems still persist. I'm hoping someone can spot something that I'm missing here. Any help is appreciated.