Ok, really strange one here... Dell Latitude C400 running Windows 2000. No known software installs or driver updates go along with the start of this problem.
Computer boots fine and Ctrl-Alt-Del brings up login prompt. User is able to type and log into windows with no problem.
However, once windows is fully loaded the alpha/numeric keys stop functioning. Other keys (i.e. Ctrl-Alt-Del, Page Up/Down, etc.) continue to function fine. Mouse functions fine. Programs open (i.e. Word) using the mouse. However, no letters and/or numbers work in any program (not even when Clicking on Start -> Run).
Going into control panel and accessing the Keyboard or Regional Options both yield an Input Locales tab which when click on immediately crashes the computer and begins a reboot. Symptoms are identical in Safe Mode. I've searched but haven't found anything on this sort of problem. I'd like to know if there is some way to restore Input Locales to default settings in the registry (either by deleting or changing an entry???)
Computer is running NAV with current definition files. I have not checked for spyware, but have only been trouble-shooting over the phone so far with no success.
Any help will be greatly appreciated.