Now this is a very basic tip that involves editing values in the Registry. So, if you are not game enough to play with the Registry, I’d suggest stay out. But if you are willing to have a faster shutdown, read on. Go to Run [ Windows +r, or start Menu ,Run]. And then, type ‘regedit’ ( withouth the quotes) to go to the registry editor.

Now go and expand the explorer folder that reads :HKEY_LOCAL_MACHINE.

Next go to the tree structure to its child elements to SYSTEM, and then CURRENTCONTROLSET and inside it select Control.

[In case you didn't follow that, the entire path is :
HKEY_LOCAL_MACHINE/SYSTEM/CURRENTCONTROLSET/Control]

Now on the right side, you will see a file called WaitToKillServiceTimeOut. By default, the value set for it is 20,000. To accelerate the shutdown speed change it to something smaller than 20,000. May be 1000 or any number dear to you. And voila! Jobs done and you will sure notice the difference.

But yeah, please try it at your own risk, and do know how to undo it, incase the shutdown speed is a bit too fast for your taste.