I replaced batteries - no change. Batteries taken out are bright in my flashlight.
I exchanged mouses - no difference.
I have conclude that the physical mouse is ok, but that some sort of set-up function has been changed, accidently.
LEFT clicking mouse on any icon, any symbol works fine. All movement is correct.
The only function not working is when I click on any box requiring an ID or PASSWORD, the expected flashing line (cursor) does not appear, and I cannot type any information in to that box (ID or PASSWORD).
This post should move to the software section, I guess. Can you do that or should I start a new post?
Art