Windows XP shut down, automatic reboot problem is not new. After finishing the day’s work, you click "Turn Off" assuming Windows will close the machine. Often, this does not happen due to Windows XP restart problem. As soon as it seems to shut down and you think you can leave the workstation, you see Windows XP rebooting again.
Many of us have experienced the Windows shutdown problem among many other Windows XP problems. In most cases, the problem is related to Software Compatibility Issue, Recovery option, or a BIOS problem. Sometimes corrupt hardware drivers also contribute to the Windows XP Shutdown problem.
If Windows XP reboots after you try to shut it down, you can check and download latest device drivers from your machine’s official site. This may fix Windows XP reboot problem. If it does not, then you need to troubleshoot Windows XP further as detailed in next section.
Tip for Faster Windows Shutdown: You can set your computer to shut down upon pressing the power button by going to the Display Properties window (by Right Clicking on some empty area on the Desktop). Select the Screen Saver tab and then click on the Power button. In the resultant dialog box, select the Advanced Tab. Here you will find the option “When I press the Power Button on my Computer.” You can set the option to Shut Down. This way you can tweak the OS for faster Windows shutdown.