Thanks for this link. I googled for more info. based on the above thread. The issue is called Slowkeys, so I googled for kde keyboard slowkeys and found this info.: once KDE is loaded, do this: go to
2. Regional and Accessibility
4. Keyboard Filters and then
5. Uncheck Slowkeys Box,
6. then click on Apply at the bottom
this solved the problem.
Thanks again for the link, whew glad this issue is solved !!