I have two virtual machines set up from Virtual PC on Windows 7 Professional: Windows XP Mode and Xubuntu. Last time I used them (last month or so), I had closed them by hibernating.
Evidently, I have meanwhile downloaded a Windows Update affecting VPC and now receive the following error in restoring either of them from hibernation:
'Xubuntu' could not be restored because of either host processor type mismatch or lack of hardware-assisted virtualization support in the system.
I've been through the virtual machine's settings, and there's nowhere an option to simply reboot it. (Virtualization is not the problem, as I can create a new virtual machine without any problems.)