Hi Rich, thank you very much for such a fast reply.

However, the Num Lk button appears to work fine when pressed and unpressed - lights up and an audible sound to show its on / off - but then when I try to type in numbers from the keypad, there is absolutely no response, even with the Num Lk light lit up. The numbers on the top line of my main keyboard work fine (but are slow to use when keying in lots of numbers).

In summary, even when the Num Lk button indicator is lit up to show its on and functioning, when I press any number on the right hand side keypad it does not display on screen - cursor just blinks. This is the same with any programme I use; both Word and Excel etc.

Any ideas?

Hi Rich

Just checked and the following buttons are ALL checked:

turn on mouse keys

turn on mouse keys with left + left shift + num lock

Other Settings: use mouse keys when num lock is ON

Should I uncheck some of them?

YES!!!!!! It worked.

You are a genius Rich!! This has been driving me mad for over 6 months.

Thank you very, very much for taking the time out to help someone unconditionally. What a nice person you are.