I have been having this problem lately with my sound card. Every time I try plugging in my speakers my computer freezes and then I have to reboot. I was thinking it might need a driver update but it was working earlier this summer and I haven't done any updates since then seeing how I don't have any internet connection to it now that I am home from college. So I think it might also be a hardware problem but I wouldn't think that would stall the whole computer. If anybody has had a similar experience or any idea of what it is that would be cool to get some info. thanks