On Fri, 10 Aug 2018 01:08:13 +0100, Paul wrote:

Jimmy Wilkinson Knife wrote:
On Thu, 09 Aug 2018 22:55:29 +0100, Mark Lloyd wrote:

On 08/09/2018 01:59 PM, Jimmy Wilkinson Knife wrote:
On Thu, 09 Aug 2018 18:55:31 +0100, Mark Lloyd
wrote:

On 08/09/2018 08:31 AM, dave61430 wrote:

[snip]

I'm posting this after having read the responses so far. If you
want to
eliminate a possible windows problem, make yourself a live linux
media,
Mint 19 is good, and test the problem on that system.
If all is ok, just install it and live happily ever after.

Yes. That's a really good idea.
Just for one key....

Not for the key, for problem diagnosis.
I have no other problems, well not computer-related anyway.

Of course, there's the other benefit. He could decide he likes Linux.
I would never decide that.

Why don't you experiment with "osk.exe" ?

This picture shows a copy of Notepad with the
focus, and OSK.exe is typing into it.

https://s33.postimg.cc/3ncdzmhbj/OSK.gif

Clicking "Shift" arms it for one key press
and then the state should be cleared.
So "Shift" "f" types an F. There is a caps lock too.

The f key failed again so I tried OSK. That also could not do a lower
case f.