Hello, Before I begin, please excuse for the slightly long-winded tale that this will undoubtedly be! Just quite a few lil parts to it.... I recently had a wireless PCI card in one of the two PCI slots in my PC. The other slot is unfortunately covered by the graphics card, so in effect I only have one PCI slot. So I discovered after a good long time of faffing that the wireless card I had bought did not support my OS (Vista Home Premium) .... vista. So, a week or so ago I was updating my graphics card drivers and I downloaded this HDMI audio driver along with the Radeon drivers (its used for directing sound through your graphics card for use with an HDMI television, afaik). Thinking no harm would come from this I installed them just in case I might need it one day! Unfortunately this then took over from the sound I was using at the time which was the integrated sound card on the motherboard. I was then unable to switch it back. So, I uninstalled the HDMI drivers... but they wouldn't leave. I have tried reg cleaners and DriverCleaner. I then thought, I know! I'll put in the sound card from my old PC seeing as my one PCI slot is now free. So I switched the machine off, took out the wireless card and shoved in the sound card. I then powered it up, entered the bios, disabled the integrated sound card and continued on into windows. Unfortunately Windows didn't notice any difference, no "new hardware detected" message. So at first I thought it was because I hadn't booted up between swapping the cards, so I tried that (booting up with no card in at all, then switching off and putting the card back in), but I had no success. So I'm really not sure where to go at this point, in "Playback Devices" in the Sound configuration all I have listed is "Digital Output Device (HDMI)" from the f**king graphics card drivers! And nothing else. Absolute pain! hah Anyway, any ideas would really be appreciated, I'm pretty stumped! Let me know if theres any extra information that would be useful. Many thanks in advance, Nick

Did you try uninstalling the Cataylst drivers as well as the HDMI drivers?

I did yeah, unfortunately the HDMI part remained :( thanks for the reply :)