Windows XP Hangs At Shutdown Screen

Note: Before perform following steps you need to take backup 
start > run > type regedit > press enter > go to file menu > click on export> save in any place as you want like desktop or c:/

Step1: Open REGEDIT and navigate to ‘HKEY_CURRENT_USER\Control Panel\Desktop\’
Highlight the ‘WaitToKillAppTimeout’ value.
Set it to ‘1000′.
Now highlight the ‘HungAppTimeout’ value
Set it to ‘1000′ also.
The second part of this tip changes the same settings, this time for all users on the system.
Step2: Open REGEDIT and navigate to ‘HKEY_USERS\.DEFAULT\Control
Panel\Desktop’
Highlight the ‘WaitToKillAppTimeout’ value.
Set it to ‘1000′.
Now highlight the ‘HungAppTimeout’ value.
Set it to ‘1000′ also.

In the third part of this tip, we will alter a second registry setting to decrease the amount of time Windows XP will wait before shutting down active services after receiving a shut down command.
Step3: Open REGEDIT and navigate to
‘HKEY_LOCAL_MACHINE\System\CurrentCont…
Highlight the value ‘WaitToKillServiceTimeout’
Change this value to ‘1000.’

To allow Windows XP to close non-responsive applications automatically upon shutdown:
Open REGEDIT and navigate to ‘HKEY_CURRENT_USER\Control Panel\Desktop’
Highlight the value ‘AutoEndTasks.’
Change the value to ‘1′
Step 4: Open REGEDIT and navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControl… Manager\Memory Management Change the value of ClearPageFileAtShutdown to 0. Close the Registry and restart your computer 
XP will now be able to close hung applications without user input during the shutdown process.
This tweak has really increased my systems shut down speed. I can now shutdown my PC within a few seconds.

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