Sandra, my apologies for not having responded sooner. But I did find the answer to my loss of audio after finally being smart enough to talk to Motion Computing support (the makers of my Tablet PC). It is not my system, but what is plugged into it, and I have everything including scanner, printer, extra monitor, camera, cdrw, and speakers. The culprit turns out to be my cordless keyboard/mouse combo. With it unplugged the audio comes back fine. I shall just unplug it from the USB port before I go into standby, or replace with corded versions. I still wish I knew what the actual cause is, and I will contact Logitech (the cordless keyboard/mouse manufacturer) and see if they have any thoughts. Latest drivers changed nothing. Thanks again. By the way, the soundcard in the Tablet is called Sigmatel.