Hmmm. When I tried the update wizard on WinXP it wanted to install a new set of drivers to access the device for the update wizard. I wasn't too surprised about this as I assume that anything connected to usb under WinXP requires some sort of driver (i.e. no raw mode access, this also needs a driver), but it did mean that while installing these new drivers the N800 timed out and booted.

It was already recognised it as a mass-storage device from normal use (which again requires Windows to 'install' drivers - no idea why each different mass storage device needs to have 'new' drivers installed).

I must say that I never got the update wizard to work. Another reason why Windows is rubbish

Would be good to see the source code for the Windows updater as lots of people have troubles with it.