Help!!! Out of the blue I lost all audio from my Studio 1749 Dell laptop with Windows 7. It has an x over the speaker button and says "No audio output device is installed" I have read many posts and so far nothing has worked. I have done the following:

• went to device manager and removed all audio drivers
• Removed all WMD files
• Tried to re-install the audio driver (IDT) from Dell and I would get an IDT error "The hardware detected is not supported by this IDT software package and the install will be aborted"