I have a PC system with a AMD X2 dual-core processor and Windows 7 professional.
I am using Windows XP mode to use a scanner that doesn't have Windows 7 drivers. This used to work fine.
But all of a sudden, Microsoft Virtual PC refuses to start up with a message approximately saying (translated from German so not verbatim):
Windows XP mode could not be initialized because of a mismatch in the host processor type, or because hardware virtualization is not supported.
I have not changed my processor configuration, nor anything else on the system.
I have checked the BIOS and the "Virtualization support" switch was turned off. I turned it on, but to no avail.
What could be the reason for this?