At that point, I wasn't sure what the problem was, so I purchased Error Killer, and it found a couple hundred errors that it claims to have fixed. Still have the dvd problem, but I was actually able to shrink a few before it shut down in the middle of one again. I timed it and the shut down occurs after roughly 15 minutes, don't know if that means anything.
Two days ago, I used Movie Maker to put together some of my photos and add some music, etc. All worked well, the project saved ok, then when I tried to burn to hard drive or cd, the computer shut down. I tried again and that's when I got the error message that said the virtual memory was low and the paging file size was being changed. Restarted the computer, opened Movie Maker, opened the saved project...as soon as it opened it shut down.
Tried reinstalling Movie Maker, but that didn't fix the problem.
I have looked at several "help"sites on the web, and have tried changing the size of the paging file. Also tried turning off auto restart in startup/recovery settings, and followed the advise on the box that came up (to restart computer and run computer management/services/ etc. We still have a problem...