This was originally posted in m.p.w.v.hardware_devices but no response to
date.

I am trying XP64 and Vista 64 to decide which to use on a new PC I am
building.

Vista 64 runs fine, much better support for 64 bit drivers now, but my
network has disappeared (it worked yesterday). In Device Manager the NIC
(NVidia) is shown as working properly but the Network Centre says there
are no network devices. I have tried to un-install it but that doesn't
seem to work. I am using the latest NVidia drivers. I have been round the
loop of clicking the various help buttons that appear but they all end up
offering to help me find a wireless network. It works fine in XP64 so I
don't think it's a hardware problem.

Vista was winning by a short head but this is a show stopper, I can't
understand why Device Manager says no problems but the OS doesn't think
there is a NIC installed.

Any thoughts? I have gone back to XP64 for now and the network is working
fine.