When Windows shuts down, each running process is given 20 seconds to perform cleanup work by default. If a process does not respond within this time-out period, Windows displays the "Wait, End Task, or Cancel" dialog box for the process, which prompts you to wait for another 20 seconds, stop the process, or cancel the shutdown process.
Prolonging the Time-Out Period
Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article:
To prolong this time-out period, you can modify a registry value. The default time-out value (20 seconds) is stored in the WaitToKillAppTimeout value in the following registry key:
HKEY_CURRENT_USER\Control Panel\Desktop
This value is expressed in milliseconds. You can use Registry Editor to modify this value and then restart the computer for the change to take effect.
how to Increase or Decrease the shut down time of Operating System XP or Vista
1. Go to regedit
2. Find HKEY_LOCAL_MACHINE
3. Find SYSTEM \ CurrentControlSet \ Control
4. Then change the WaitToKillServiceTimeout value
5. Default value is 20,000 milli seconds if you decrease means shut down time will reduce vise versa
6. minimum time should be 3000 donot give below 3000
Warning :
Donot play in regedit it will affect your Operating System
NOTE: In general, it is best to refrain from increasing the shutdown time. For example, if your computer loses power, your uninterruptible power supply (UPS) may not be able to provide backup power for the computer long enough to allow all the processes, as well as the operating system, to shut down properly.
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