On the keyboard when you press the "Alt" in the active window there appears an alternate menu:

Can you please tell me how to disable this feature without disable the key, because it is used to switch the language, and a few functions?
I forgot my user e-mail SomeNameDub, for this reason I write from SomenameDubDub.
The question is solved.
At the moment, could not find a way to disable the alt-menu by means of Windows. For this reason, using the program AutoHotkey.
To turn off the alt-menu should:
1) Download the program AutoHotkey.
2) Go to the Libraries -> Documents.
3) In the Documents folder, select the file Autohotkey.ahk and open it with notepad.
4) When the file you want to insert a line ~LAlt Up:: return
as found somewhere @MS
cheers Jens
I don't think you disable that it have been the same even in the old versions of windows but they looked different
Well a key mapping tool might mess up with other stuffs like Ctrl+Alt+Delete