I would not recommend installing an XP driver on Vista (i have experience doing this and in the long run is not the way to go IMO). I would verify that you have donwloaded the latest WDMC (Windows Device Mobile Center) and install it, found here ->
http://www.microsoft.com/windowsmobi...icecenter.mspx
I run Vista 32 bit SP1 and Vista 64 bit SP1 and used the Apache Kitchen with success.
Some tips for running the RUU tools.
- First, disable temporarily in the WDMC the usb connections and other connections
- Run as admin as suggested by above replies
Hope this helps ...