PS CS1 Shutting down my machine!!!

[Toaster]

Hey guys!

I'm new here and I hope that I'm not going over old ground asking this, but when I'm using PS CS, after about 5 mins it just turns off my machine! Not in a nice way either, it just turns off! I'm running it on an HP ZD7000 series laptop, p4 3.2G with 1G RAM, and I have no problems running any other high memory usage, high processor usage applications! I don't know if anyone else has had or heard of this problem, but I can't think of anything that would be causing this, so if anyone can think of something that I can try to sort it out, I'd be immensely grateful!

Thanks in advance for any help!

Toaster