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Never mind - accidentally put in my old activation number for 2.2 instead of the 3.0 one.
I also have this problem - went to upgrade from 5582 and it asked me to register (why all of a sudden do you HAVE to register to get an upgrade,...
Never mind - I was able to jump into safe mode and update Parallels tools and everything is fine now.
I just upgraded to 3186, and the Windows splash screen shows up when I start the VM, and then it just goes black, HDD activity is going on, and...