I have the Windows 7 Ultimate 32-bit RC from earlier this year, build 7100.
I have a HP LaserJet 1320 whose drivers
were a devil to install on XP, but it's automatically handled by Windows 7 and I couldn't be happier... it prints and seems to work OK now.
Trouble is the otherwise-heavenly Windows Update keeps listing a driver
update for the printer, but the installation of that update always fails w/ code 80070103, which doesn't have any useful information.
The update is known as "Microsoft driver update for hp LaserJet 1320 PCL 5."
When I install, it creates a restore point, looks like it is all proceeding fine, than proclaims "Some updates were not installed" and says Windows Update encountered an unknown error."