Some times when you shut down your computer , it takes too long to shut down. Follow below simple step to quick shut down your computer.
1) Go to Run and type regedit.
2) Now go to HKEY_LOCAL_MACHINE > SYSTEM > CurrentControlSet > Control
3) Click on “Control” folder in right side.
4) Now Select “WaitToKillServiceTimeout” Right click and select Modify.
5) Set it a value 800.
6) Now see how much time your computers takes to shut down.