But I've kept this system alive until I could find out the fault. I'd normally have done the latter any way by now, in the course of my normal work. I've read all kinds of advice telling me to return the motherboard as there's a hardware fault (there isn't, I've run functioning installations from a separate hard drive on the same PC) or reinstall Windows. I've had this problem for a while now on one machine in my office. The automatic troubleshooter says “Audio device is disabled”, even though it's not.
