Hi Robert.
I'm David, and I'm happy to help you.
I've seen this behavior occur on several computers that were using the Portuguese keyboard layout. After several other procedures were done, I found malware on these computers that were causing this behavior.
Maybe it's the same situation that is happening to you. I was able to remove this malware with Malwarebytes.
Therefore, do a full scan using Malwarebytes.
Download through this link: https://malwarebytes.com/
IMPORTANT: When installing, a 14-day trial will be activated. I suggest disabling this trial to avoid conflict with your current antivirus. Access the Malwarebytes settings (gear icon at the top of the window), tab "Account" and click "Disable".
After scanning, you can uninstall it.
I hope this helps. Feel free to ask back any questions.
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Standard Disclaimer: There is a link to a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.