While working in Windows XP on my iMac, I believe I inadvertently removed the driver for the built in audio device - the IDT High Definition Audio CODEC. And so now I have no sound on my computer. I have tried reinstalling the driver, but at the end of the installation process it says that the device cannot start. My system automatically detects the device as new hardware when I restart the computer but even though I have removed and and tried to reinstall the the driver several times, I cannot get it to work. When I go through the device troubleshooter, it tells me to detach the problem device and reattach it. However, the audio device is built into my mac, so that is not an option. I would appreciate any help with this problem. I pasted that in because it happened to me, exactly the same way.