It sounds like your XP machine is caught in a rebooting loop. In order to troubleshoot the cause of the issue we have to get to a blue screen (or stop message). In order to get to a blue screen you will need to change a setting on the computer. You might be able to accomplish this by booting into safe mode.
- Restart your computer
- Repeatedly hit the F8 key while your computer is starting
- Choose Safe Mode when prompted
Then go to:Start > right click on My Computer > Properties > Advanced tab > Startup and Recovery Settings
Uncheck Automatically Restart
and then OK
Now when your computer wants to reboot it should freeze on a blue screen and you will have to reboot manually.
The 'Blue Screen of Death' (or BSOD) is refered to by Microsoft as a Stop Message. They can occur for many reasons. In order to diagnose it's cause we need as much info as you can give about the stop message. Please write it down and post it back here the next time it happens. In particular, it helps to have the somewhat cryptic series of numbers about half way down the blue screen that have this sort of format:
0x0000008E (Followed by four other sets of numbers in parenthesis.)
It is also helpful to know the answers to these questions:
- What are you doing when this happens (are you on line, starting the computer, etc).
- Does it always happen at the same time?
- Is it always the same message, or is it a different set of numbers each time?
- Have you added any hardware or software lately?
- Are you experiencing any other buggy behavior from this computer (such as it runs slower than it used to, etc)?