Monitor is 640x480 can't change

The computer is an old Dell and running windows 98se. The monitor is set at 640x480 and it cannot be changed using the usual methods. The colors is set at 16. I tried to do a scan to download the proper driver using a toolkit advertised on the net and that wouldn't work because the tool kit requires 600x800 to scan. I tried a different scan with a different tool kit and that totally froze up the computer. I think I need GelForce2 but I'm not sure and I can't find that version (2) anywhere. It seems that anything relating to 98se is obsolete and impossible to find. I'm still looking for a driver for the HP deskjet printer 712c and I can't find that either. Frustrating.

 

The list of printers on the Dell that are recognized is quite long, but of course this particular printer is not on the list. Concerning the monitor, it was fine before my daughter started deleting things and it was 600x800.. I think she deleted a graphic driver and I think it was GelForce 2. It was a lot worse, but I managed to get most of it back. When I started working on the computer, nothing worked. At least now she can get on the internet and do a few things. Before she couldn't do anything, but we aren't there yet. Thanks...