So, Here are some other methods to resolve keyboard input not working in start menu, Microsoft edge and login screen. Because, The actual problem is windows not the keyboard driver. These may work temporarily for a very few users.
icns file came by mail, or through file transfer (Skype.): in that case, use Img2icns and the problem will be solved).
(for example, you can have the problem when then. But, when this does not work for any reason, try Img2icns. icns on the old icon in the 'infos' windows, and done. The red area should of course be as small as possible.
When using an external keyboard, you can even use many common Mac keyboard shortcuts, such as Command+C.
