I have a client with a program running on Windows XP. The system is never attached to the internet, it runs plant software. It is not even on a network, it is standalone. The program running on the system can no longer be purchased (written for them years ago). Program cannot be installed on Windows 7. I used Disk2VHD to create a virutal pc. I then installed Windows Virtual pc on a new computer (both computers are Dell). I can open the VHD. However, upon opening, I get a message telling me that Windows must be authenticated. I select OK and I get an immediate reply telling me Windows is authenticated. I select ok and the message goes away, only to be replaced by the same authentication message. I am not trying to pirate. The company purchased the XP OS on the Dell system years ago. I have a product key. Can anyone give me any ideas on how to work around this?