I have the same problem/Windows 7
I have recently migrated from an HP Laptop running Windows 7 to Parallels 8. Everything works really nicely. I love it. Except it hangs when it tries to shut down. Fortunately, I can kill the VM and then when I start up again, Windows 7 recovers and I can keep working.
I am going to keep trying stuff. (I already tried a second migration and I'm going to try a third. And I'll also set up a new VM from scratch.) But for now, I really wish the hanging on shutdown would go away.
I'll try sending a problem report, too.
Last edited: Oct 24, 2012