Microsoft has made a hotfix available for Virutal PC 2004 (post SP1) that fixes a bug that occurs when you leave a VirtualPC instance running, suspend your system, resume your system, and can no longer interact with the VirtualPC guest.
KB889677 - Describes the problem when the computer resumes from hibernation, Virtual PC 2004 stops responding temporarily.
Special thanks to Ben (Virtual PC Guy) for helping to get this fix out!
Non è disponibile per il download... bisogna chiamare il PSS e farsela mandare! :-(