I'm having an issue with vista and my x1650 pro.I have an upgrade version of home premium . i am going thru ati at the same time but the asked me this last time if it was an upgraded version. What would that matter? here is the error; atikmdag.sys page_fault_in_nonpaged_ area. I cant do the work around. this is what i get, your current display driver does not allow change to be made to hardware acc.settings. I can go to safe mode but it wont save it. I am running 2 hard drives 1 with xp 1 with vista. it doesnt matter what i do , I can unhook the 1 with xp and still the same thing. it does work great in xp. I put my 9550 in and all is well. but I just bought the X1650 pro AGP and want it to work with vista. Please help. Thank you, Linda Miller