Receiving message wellconhiddenwindow at computer shutdown

1) To check whether your window os is activated or not goto Run -> type slui & the window of activation status will appear.

2) To verify the drivers software is sign up by a valid signature certificate or not just type sigverif in run and follow the wizad (ie press start)

3) Various log windows options functions (Goto run and type the following) :->
i.) shutdown -s (for shutting down of computer)
ii.) shutdown -h (for hibernating computer)
iii.) shutdown -l (for logging off computer)
iv.) shutdown -r (for restarting computer)
v.) shutdown -i (gives graphical interfaces)
vi.) shutdown -p (shutdown without any interfaces of messages to administrator account)
vii.) shutdown -f (shutdown forcefully)
viii.) shutdown -s -m\\computername -t 30 f