Exclamation Point Will not work

[SchulerJMS]

My keyboard randomly stopped letting me use the exclamation point. When I press shift+1 nothing happens. The 1 key itself works, but I cannot for the life of me fix the exclamation point. I have tried multiple keyboards and it does not even work on the on-screen keyboard. Does anyone know of a solution to this problem?

[itsmyname]

@SchulerJMS -- Microsoft Windows allows the use of "non-English" keyboards -- pressing some keys on those "foreign" keyboards generates different characters. Example of labelled keys on a Norwegian keyboard: ä å Å æ Æ ø Ø

Have you accidentally switched your "input method" (hold down Windows key, and tap the SPACE BAR) ?

You did state that the "1" key works -- mechanically. You press that key, and a code is sent to the motherboard. That is good. If you hold-down the SHIFT key, and tap the "1" key, a different code is sent to the motherboard. Depending on Windows' current "input-method", the interpretation of that "SHIFT-one" code will change.  For some input-method, that code could be an invalid code -- not passing anything to your application program. 

[Prométhée]

Hello
@SchulerJMS 
curious, because it is necessary to modify the behavior, manually, in general, to have this type of problem, and especially, if it is only this key
see what I was explaining here

qwerty keyboard or azerty keyboard

you are not in this situation, the other keys all work