Good day! I'm Raniel, a Microsoft user like you. I understand your frustration regarding this issue and I'll do my best to help.
Just to clarify, did you make any changes to your machine before encountering this issue? Have you also tried to isolate the issue by using a different keyboard?
First, kindly check for dirt that is blocking the keys or sensor, then run the keyboard troubleshooter: Go to Start > Settings > Update and Security > Troubleshoot > Keyboard > select Run Troubleshooter.
Another option is to reinstall your keyboard driver:
- Open command prompt using your admin rights then type "devmgmt. msc" on the command prompt window to open Device Manager
- Expand Keyboards > right click on your keyboard driver and select Uninstall device
- Select the option to Delete the driver software for this device check box > Uninstall.
- Perform a clean boot: https://support.microsoft.com/help/929135/how-t..., then reinstall the keyboard driver by going to Start > Settings > Update & Security > Windows Update > Check for Updates.
- Go back to Device Manager. Click on Actions and select scan for hardware changes, then check again
If that didn't work, kindly enable the "built-in" administrator account to isolate the issue:
- On your search bar, type command prompt and select "run as administrator"
- On the command prompt window, type
net user administrator /active:yesand press Enter - Reboot your machine, then login to your admin account, and check if you'll encounter the same issue.
Note: If you don't encounter the issue on the built-in administrator account, I suggest that you create a new user account (go through the steps under "My computer is in a workgroup") . Please refer to this article as a guide: https://support.microsoft.com/help/14039/window...
I hope this helps. Good luck!