I'm installing things on my new computer and it has an annoying habit of rebooting all by itself when I'm in the middle of doing something.

I have never experienced this type of thing before.

This computer has XP Pro on it.  My laptop had XP Home but never did that.  And my old computer had Windows 2000 and didn't do it either.

I did a search on the internet and found something about turning off "auto reboot" which I went and did, but it's still doing it.

So far all I've been doing is surfing the net between sites that I'm a member of, installing hardware and software, and copying over saved content from CD to my hard drive.

I notice that it's happening when I'm searching for files on my hard drive as well as when I'm copying files from CD to hard drive. I haven't noticed it do it any other time.  When I'm copying over CD content I can get through 2 or sometimes 3 CDs before it reboots, but haven't been able to do more than that without it rebooting.

Also, I'm not sure if it's a memory issue or not, but I seem to have problems with my Mozilla-Firefox browser and the spell check feature.  Periodically every word I  type is underlined in red indicating incorrect spelling. If I close my browser and reboot my computer the problem is fixed.

Is there some setting in XP Pro that I need to change in order to stop my computer from rebooting or is this something I need to talk to the computer store about?  It doesn't seem like a big deal but it's very annoying to have your computer just shut down on you in the middle of a task.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi