I've seen suggestions for fixing the installation agent hanging at other percentages, but not for my issue, in which the tools installation agent is hanging at 51%. Worse, I cannot do anything in the Windows VM because of the hanging--not a single keystroke is registered, nor does any item from the menu work. I tried stopping the VM, but it corrupted the reboot, so I had to go back to the snapshot with the tools installation agent hanging--apparently, I can't seem to find previous snapshots, even though I know I've had them. Does anyone have any idea what I can do to restore Windows 10?