ok folks, I need some expert help here. This is gonna be kinda long so bear with me. All my specs should be on the left there. Ok...I had this system up and running just fine with xp pro. I installed vista and disaster struck. After installing vista i had a display but vista was giving me an "error code 43: Device is not working" error in device manager. Vista was using standard VGA drivers and I had video and the s-video out was working on my 8x 256mb agp ati radeon 9550 but I didn't have vista's aero. OK...so i installed catalyst for my card and vista, which installed fine, but i was getting an error either from vista or catalyst (don't think it said which) saying "there is no video adapter installed on this computer". grrrrrrr....i uninstalled catalyst and the adapter with the error code in device manager. Scanned for new hardware, vista found it as the correct adapter name and said i needed to reboot. Great! On reboot it went through the standard bios stuff, said windows loading, screen went black, heard the windows login screen come up, hmmm...typed my password, heard the windows startup sounds, screen is black. Ok fine! removed card, put in an old GeForce (64mb) restarted...worked fine. shutdown, cleared cmos, put card (radeon) back in still black screen after windows loading. I have spoke with ati and after a couple of days of them telling me to do this and that (after I already told them i tried it in the correspondance in the first place!), btw do they actually read what u say or just pick out a keyword and send a standard response? They say that the card is compatible with vista and the native drivers should work. Must be a MOBO problem. I spoke with mobo people (pcchips) and they said their m848a v5 board is fully compatible with vista. It must be a card problem. There is no bios update, chipset update or updated SiS accelerated graphics port drivers available or needed. Vista has the newest versions of all drivers already. I know, scrap vista and go back to xp...well i don't wanna! Can anyone help me out? I don't wanna purchase a new card if i'm gonna have the same problem nor do I wanna purchase a new mobo to have the same problem. My wife would kill me anyway since i just spent several hundred dollars on vista home premium and some hardware.