i have just recently bought a HDTV that can double as a monitor and a new HD video card. upon installing the drivers for the video card, and hooking up the tv as the monitor, windows XP(SP3) after a restart, prompted me to install Microsoft's UAA Bus driver. ive never had this on here before, but after doing so, i have lost ALL sound. now i use an external USB Sound blaster live for my audio card and have found no real "high definition drivers" and have reverted to using the onboard sound card, and reinstalling the realtex drivers as recommended by several places, however it is to no avail. i have several yellow "?'s" in my device manager, and even two copies of Microsoft's UAA Bus driver!!! please help