Windows XP is a line of proprietary operating systems developed by Microsoft for use on general-purpose computer systems, including home and business desktops, notebook computers, and media centers.
To shut down Windows XP faster you need to do some changes in your registry.
1. Click Start menu button -> Run...
2. Type in regedit and hit Enter.
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5. Double click WaitToKillAppTimeout and set its value to 4000.
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5. Now navigate to HKEY_LOCAL_MACHINE -> System -> CurrentControlSet -> Control.
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6. Double click WaitToKillServiceTimeout and set its value to 4000.
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7. Reboot your machine and the next time you shut it down it will happen a lot faster.