This is a small PC, 8" x 4" screen, running XP Pro SP-2.
Everything was working great, although every so often there's a hiccup, like a hard shut down then it checks the file system on startup.
It was set up for 1024 x 768 and that was great. This size is bigger than the physical screen but it worked fine, just scroll up and down.
My wife turned on the machine and it asked her "Do you want to restore the original settings?" or something like that. Now it's stuck at 640 x 480 and I can't change the settings. I can move the screen resolution to 1024 x 768 but when I press ok it flickers and then goes back to 640 x 480.
How can I troubleshoot this?