I may be wrong
...but looking at the support page for MS Virtual PC...you cannot run it on Win XP systems. It is supported for instllation/use only on Win 7 systems. Host systems indicate systems where it can be installed, while client/guest indicates the versions of Windows which can be run on it.
You can run XP on systems via MS Virtual PC (as client) but not install it (
:"Can I run Windows Virtual PC on a PC running Windows Vista or Windows XP?
No. Windows Virtual PC is an optional component of Windows 7 and is not available for Windows Vista or Windows XP-based PCs.
Can I use Windows Virtual PC to run Windows Vista, Windows 7, or Windows XP in a virtual machine?
Yes. Windows Virtual PC can run properly-licensed versions of these operating systems in a virtual environment. For requirement details, go to http://www.microsoft.com/windows/virtual-pc/support/requirements.aspx."
IMO, there's no telling what happened...but I would guess that your XP install is damaged.
a. Try to ensure that the application is removed, checking Add/Remove Programs first...then using a program like Revo Uninstaller.
b. I would then probably do a repair install of XP Pro...or at least reinstall SP3, trying the SP3 reinstall first. An alternative to doing a repair install would be to try to run the sfc /scannow command.
How To Use Sfc.exe To Repair System Files - http://www.bleepingcomputer.com/forums/topic43051.html
How to Perform a Windows XP Repair Install (Stevens) - http://www.michaelstevenstech.com/XPrepairinstall.htm
FWIW: I'm not sure that your current problems have anything to do with VPC 2007. I think I tried to install/use it on my XP Home system and encountered no problems after the experiment.
Any onscreen error messages?
Edited by hamluis, 02 November 2011 - 07:20 AM.