Windows 10: Unable to type after pressed Windows key + Tab

I use this shortcut to switch between screens, but lately other than switching screens, it also unable to type out words after that. When I press some keys, it would either open up a window, start, or some random settings. How do I fix this problem?

:)

 

Unable to type in to box on 'Control Panel'.

This issue might occur if some file types for indexing were disabled after the updates. We suggest that you try rebuilding your search index by following the steps below:

• Press Windows key + R, type control.exe srchadmin.dll, and click on
  OK.
• Click on the Advanced button.
• Click on the File Types tab. From here, you can choose to include certain file types from indexing by checking them in the list.
  

Let us know how it goes.

 

Shift Key and Number key cannot be pressed at the same time.

Hello,

There are several factors why you are unable to use the shortcut keys function such as keyboard settings, or if there is an issue with the keyboard itself. To help you resolve this, kindly try the following suggestions:

• You might have selected an input language other than English. To work around with this, go to
  Control Panel > Region and Language and check. You can also check if your keyboard has a language selection available that may need to be changed.
• We suggest as well that you reset the keyboard layout by reinstalling the language and check if it fixes the issue. Follow the steps below:

• Press Windows+R keys and type intl.cpl. Hit Enter.
  
• Go to Administrative tab and click on
  Change system locale button.
• Select the correct language and country from the drop-down box.
• Navigate to the location tab and check if region settings are appropriate.
• Apply the changes and Windows will require a reboot.

Inform us for any updates regarding the issue so we can assist you further.

 

Unable to type text in any of start (search func)

• As mentioned in title, I was unable to type in the start (press start > press any key to search)
• Unable to type wifi password too (but can paste) > essentially the wifi passcode textbox that popups up from taskbar
• I have tried many well-known antiviruses, malwarebytes etc. but none could solve the issue
• I have also tried powershell scripts to fix but it doesn't work either: