How to manually unlock the mouse and/or keyboard if they were locked by LanHelper?
A. Just press Ctrl + Alt + Shift + U keys If the keyboard was locked. If only mouse was locked, press Ctrl + Shift + Esc keys to make the Windows Task Manager visible, then use your keyboard (Tab, up arrow, down arrow, Alt + E) to terminate the msspr.exe process. You may fail to terminate this process if you haven’t enough permissions. Then another simple way is restarting the computer.