Suddenly, I can't see any typed letters on screen unless I am in Safe Mode!
I can bring up the Accessible onscreen keyboard in regular mode and those selected letters do show ion the screen. Other keys on the keyboard (Home, Batterycheck, etc work). I thought My wife or granddaughter (7) might have spilled soemthing and boutght a new KB - same result!
Updated driver (with new KB)
No confllicts show in Device manager.
Tried different USB ports.
Thought somehow the type color in XP might have been set to white, but cursor doesn't move when you type.

It's the Accessibility Options in the control panel.
Try holding the right shift key for 10-15 secs and following the screen prompts