Hi,
Based on my research, please try the following:
1. Try last known good configuration and see how it works.
2. Remove the Windows XP Mode.vsv file under %systemdrive%\Users\<username>\ AppData\Local\Microsoft\Windows Virtual PC\Virtual Machines.
If issue persists, I’m afraid that you may need to reinstall Windows XP Mode.
Hope this helps.
Jeremy Wu
TechNet Community Support
