Hi,
As that was more than a day ago, I take it you managed somehow?
If not, then the "pull the power plug" alternative is to go to the menu -> Virtual Machine -> and now hold down the "Option" key on your keyboard.
The "Shut down" option will change into "Power Off".
That should turn off the machine for sure if you cannot get Windows to shut down any other way.
Hope this helps,
--
Wil
