You know the drill. You start to shut down the computer, you wait a few moments, and then you see a dialog box asking if you want to kill an application or service that is running. Instead of prompting you, you can make Windows XP take care of the kill task automatically. Here's how:
1. Open the Registry Editor.
2. Navigate to HKEY_CURRENT_USER\Control Panel\Desktop.
3. Highlight the value AutoEndTasks and change the value to 1.
4. Close the Registry Editor.
3. enable boot defragmentation, so that files used during start-up are clubbed together.
5. disable : "clear page file on shutdown" option. cleaning the page-file on every shut down means overwriting the data by zeros, and it takes time.
Start --> Run --> gpedit.msc
Computer Configuration\Windows Settings\Security Settings\Local Policies\Security Options
Shutdown: Clear virtual memory pagefile