This problem occurs if an application “ ctfmon.exe” (CTF Loader) is not running in Windows 10. It took me a few hours in finding the culprit behind this annoying and strange issue and it seems a BUG in Windows 10. So language bar is also missing in Taskbar in Windows 10. PS: Sometimes if you enabled the language bar in Taskbar, it also disappears.
There might be some other places as well like Store apps, etc where the same problem occurs but I found only above mentioned instances of this issue. So basically Windows doesn’t accept any keyboard input in Microsoft Edge, Start Menu, Cortana search and Lock Screen. You need to click using the mouse button and then you become able to login by typing the password on Login Screen. On Lock Screen, you are unable to press any key such as Space bar to remove the Lock Screen. So you are unable to search for the programs and apps. Windows doesn’t accept any input from the keyboard. Same thing happens when you try to type something in Start Menu or Cortana search box.
You are unable to type anything in the address bar. In Windows 10, if you open Microsoft Edge web browser and try to type something in the address bar, nothing happens.
