Openthe Settings app with the Win+I keyboard shortcut. Go to Time and language. Select the Language tab. Select Japanese and click Options. Click Change layout. Open the dropdown and select Japanese. Click OK and restart the system. 4. Uninstall and reinstall Japanese language. AtWindows Logon Screen, the letter keys are not working. Pressing them causes no response. Number keys work. I turned of laptop and plugged in an external keyboard and had the same results. My password has letters in it so I cannot log on. I turned of the computer and restarted pressing the ESC key to get to the startup menu. InputForm controls can be used to mask and allow only specific values. For example, to get Customer ID we only want a user to enter numbers and for a username only alphanumeric characters are needed. In this post, we'll discuss how to add a mask on Input control to restrict a user from entering restricted values. Trytyping the numbers from the top row of keyboard. Try resetting the PIN in case it's corrupted: Here's here how to reset the PIN in Windows 10 when it will not work from Settings > Accounts > Sign In Options: Open Windows File Explorer using the file folder icon on your task bar. Tick the box in File Explorer View tab to Show Hidden Files. Ifthese keys are working in the startup menu, but then fail when Windows loads, the problems might be related to the keyboard software. Restart the computer. In Device Manager, uninstall and reinstall the keyboard software: In Windows, search for and open Device Manager. Click View and select Show Hidden Devices. Clickon the Apple menu and select System Preferences. Then go to Accessibility, and click Keyboard. Select click Hardware and disable Slow Keys if the option is enabled. Then go back to Accessibility and select Pointer Control. Select Alternative Control Methods and disable Mouse Keys. P53KX50.

only alphabets are not working in keyboard