Keyboard Repeat Rate Changes by Itself to ‘Slow’

I’m running Windows XP, and for many years now, the keyboard repeat rate will change automatically from maximum speed to slow speed. Then I have to open the control panel / keyboard settings and readjust it. This can happen several times in an hour, depending on the program I’m running.

I’ve googled this query and can’t come up with anything. There must be someone out there who knows why this annoying adjustment is happening.

Thanks