Accelerate the boot up and shut down time

Reduces the waiting time
Open Registry Editor, Look in to:
HKEY_LOCAL_MACHINE > System > CurrentControlSet > Control
Set the Value of "WaitToKillServiceTimeout" to 1000 or smaller(Default 20000)
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HKEY_CURRENT_USER > Control Panel > Desktop
Set the Value of WaitToKillAppTimeout to 1000 (Default 20000),
Means the time used for closing program = 1 second

Set the Value of HungAppTimeout value to 200 (Default 5000),
waiting time used for closing crashed program = 0.5 second.