BSOD random on new build

I guys, so this is my third build in the last year. My own build and my friends build have gone flawlessly. So of course the one I offer to build for my boss is the one I have problems with. :( He seems to be getting BSOD at a pretty random basis. The only thing I can say has been contant, is it happens when he's streaming music (since he has it streaming all day at work.) BSOD happens about...