1) Go to Command Prompt from either
a) Start->All Programs->Accessories->Command Prompt
b) Start->Run where a new "Run" window will pop-up. Type in the following and press OK:
cmd
2) Another window with black background will appear. Type the following and press enter to schedule your shutdown time (where xx:xx is the time in 24-hour notation):
at xx:xx shutdown -s
For example if I want my PC to shutdown at 6am:
at 06:00 shutdown -s
Another example if I want to shutdown at 10pm
at 22:00 shutdown -s
3) If somehow you want to cancel the scheduled shutdown. Just type the following and press enter (where "a" means abort):
shutdown -a
