Had a weird problem with Virtual PC 2007 where the blue screen would flash up when I ran the program, yet the console window would not appear even though Virtual PC was running in the task manager and the system tray. The Virtual PC console had effectively disappeared. All this was bad enough, but this happened to me when I was visiting a customer site and just about to demo some cool new features of SQL Server 2008 ! I had even checked my demos before setting out that morning, so this was very weird (and not to mention embarrassing) ! After uninstalling and reinstalling and scratching my head for a while, I came across the solution here...

http://www.essjae.com/blog/default.asp?id=43