Nero 9 & Windows 7 problem
When I upgraded to Windows 7, I also purchased Nero 9.
The first thing I tried was to do a back up with Nero 9 to a spare hard drive. It froze each time I tried it. It froze in a different place and at a different time, but it always froze. I had Nero 7 and XP prior to this and it never failed. Since it's impossible to contact Microsoft, I contacted Nero.
They've been trying to figure it out for a week. That's my experience.