I have recently upgraded my workstation to windows 7 professional. Whenever I try to shut down or reboot I immediately get the BSOD. My systems admin guy said it looked like an IRQ issue but he hasn't had the time to look into it. I also noticed that occassionally when I turn of an external mixer that is connected via USB as my main sound card that it too will give me the BSOD. I don't know if they're related or not. How can I troubleshoot this? Thanks.