new computer keeps restarting

Hi all i just got a new computer and when i install the windows xp cd to it it never seems to make it to the finalization point. but keep shutting down and restarting. i have wiped and rewiped everything and have tried to keep down loading xp but the same problem is still there. keep shutting down and rebooting starting the process over agian.
 
Where, during the install process, does it reboot? Is it the same area every time? Is it at different times?

Memory and power supply are the most common causes for reboots. www.memtest.org
 
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