AGP video card coming up as PCI after upgrading to vista

Hi
I upgraded to vista home premium and now I am having porblems with my video
card (ATI Radeon X1600pro 512 MB) Crashes to blue screen after loading a game.

So I went to devices and found that it was coming up as a PCI
I don't know if this is the problem or not so I tride installing an older
ATI driver
and found that the games worked fine BUT! my computer would not shutdown.
It would go to the shutdown screen then crash and reboot.

I think it's a bad driver but for what?
My video card or the chipset?
And how do I fix it?

I'm thinking it was a bad idea going to vista
never had this problem with XP!!

And one more thing
I'm getting a error messege after vista bootsup it say (fAIL)
Its not telling what failed just fAIL

K8NHA Grand
nvidia nf3 250Gb chipset
1Gb DDR ram
ATI Radeon X1600 512Mb AGP
Audigy 2 value sound card