Boost Windows Shutdown Speed

Start Regedit and navigate to: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control
On the right pane look for the "WaitToKillServiceTimeout" string and change its value to 1000 by right clicking the string and selecting Modify. However, to make sure its going to work OK for you modify the value to WaitToKillServiceTimeout=5000 first and try it out.
Modified value WaitToKillServiceTimeout=1000 (1000 is a bit much for this one so be careful)3000 seems to work just about right but try the 5000 first.
(The default value for WaitToKillServiceTimeout=20000 in case you need to change it back)