On 3/1/19 3:15 PM, J. P. Gilliver (John) wrote:

I'm pretty sure it's not hardware - I can't think how _any_ hardware
fault would still manifest itself when I try to use the on-screen
"keyboard" (that you operate with the mouse).

Neither can I, but..

Trying a Linux bootable wouldn't I don't think work - my problem only, I
think, manifests itself when I've been using the combination of Windows
softwares I normally use, for a while. And I think it's something I do
that triggers it - _something_ I think related to use of the Ctrl key,
but I'm not completely sure of that, and certainly don't know what. And
I don't know what makes it clear itself either, but again I think it's
an action or combination of actions I take.

I would check anyway. I live for a cause effect problem. Most
of what I get called for has A affecting B affecting A. It
can take some multilevel thinking. The easy ones they fix
themselves. The hard ones, lets torture Todd! I can't help
it, I enjoy the puzzles. Its a living.

The worst one I fixed was A affecting B affecting C affecting D
affecting E affecting A. It took me two hours but I finally
conquered. They problem with these multilevel problems is
that I keep forgetting who did what to whom

If the Live USB shows it was software and you already knew
that, then you have a cool troubleshoot tool for use the
next time. I carry about eight of them for various things
around with me, alone with two Windows 10 PE flash drives.
Yes, some are labeled Window Nein.