If the Alt Gr key stops working, close Remote Desktop Connection if it is open. Try it out now!
There’s an old bug that causes the Alt-Gr button on your keyboard to mysteriously malfunction.
This is an old problem which still persists on Windows 10.
This bug has been plaguing me and others for many, many years. Since we use the AltGr key to produce the @ (at) sign here in Norway,
I just wanted to share the solution in case anyone else has the same issue, so hopefully it helped you out if you’re reading this, if not, please leave a comment!