Something Wrong With Vista Upgrade? (34-bit)

> Hi,
> i upgraded to vista, first for some reason when i upgraded it started
> computer and went to 4-bit and the lowest resolution, then explorer.exe
> started crashing. My computer meet the specifications but just vista wont
> work. Explorer.exe starts crashing when i open a folder or Control Panel or
> anything i can change settings but it wont let me move up to 34-bit colour
> and 1204-874 (or something like that) it just stays at: 4-bit colour and
> lowest resolution, any help?
>
> Thanks,
> Wormhole