The file is the official executable for the Microsoft On-Screen Keyboard . It is a built-in accessibility tool designed for users who cannot use a physical keyboard or for those using touch-screen devices. Default Location: %windir%\System32\osk.exe .

This lightweight program displays a visual keyboard on your monitor that allows users to input text using a mouse, joystick, touchscreen, or other pointing device, rather than a physical keyboard. It is an essential tool for users with mobility impairments, but it is also a lifesaver for users dealing with hardware malfunctions.

If the above fails, you can manually extract osk.exe from a Windows ISO file.