Explorer Problem for Windows XP

I have Windows XP and its Explorer (Windows Explorer) keeps shutting down, and then coming back on. After about 10min of it doing this repeatedly (when this is being done i cant hit start because it will instantly shut down Windows Explorer) the explorer with completely just shut down and I will have to execute the explorer from the "NewTask" when you alt control delete. And then when it has been executed it will continue coming on and shutting off for 10 more minutes and then completely shut down again. Ive tried restarting, I have ran virus checks, I have even tried restoring to a couple days back when my PC was working fine. I cant figure out what to do, and hopefully someone that reads these forums has had the same or similar problem. Or at least has heard of it.