Windows 10: Spacebar, Alt, Ctrl keys not working

Hey, I've been using my laptop for about a year now and suddenly spacebar, alt and ctrl keys have stopped working.This happened 3 days ago, I have read a lot of threads and all of them have almost same solutions and none worked yet.To clarify things, I have tried uninstalling keyboard driver and installed it, it should be up to date.Sticky keys is NOT on.I can use these keys when I connect an external keyboard AND I can also use these keys on ON screen keyboard.I have tried troubleshooting and it showed there's no problem.Help.

:)

 

Spacebar doesn't work unless I hold down ctrl.

Spacebar, ctrl, alt, and the windows key don't work properly. I struggle with alt-tabbing and copying and pasting with ctrl doesn't work either. I have tried uninstalling the keyboard from device manager already.

 

ctrl alt del to logon

Hi Diane,

Conflicts with the user account settings is one of the possible reasons why the secure sign-in option is enabled on your computer even if the box in the settings is not checked. I would suggest that you enable and disable the
Require users to press Ctrl+Alt+Delete. You can follow the steps below:

• Press the Windows key + R.
• Type control userpasswords2 or netplwiz and press the Enter key.
• Click the Advanced tab.
• Under Secure sign-in, check the Require users to press Ctrl + Alt + Delete checkbox.
• Click Apply.
• Restart your computer.
• Open the same settings again and uncheck the Require users to press Ctrl + Alt + Delete checkbox and follow the
  steps 5 and 6.
  
  

Should you need further assistance, don't hesitate to get back to us.

 

In my keyboard CTRL and spacebar keys are not working..

In my keyboard CTRL and spacebar keys are not working please fix this issue whether it is hardware issue or software issue please confirm