Hi Marque,
Thank you for your reply. Unfortunately, it doesn't work :( I know from other Polish user that for him the letter works. For me it also worked approximately 5 days ago. Is it possible somehow Windows or any other app rebound the key? I tried to use the letter
after closing all the apps but it still didn't work. How I can figure out the key bindings? I was unable to figure this out by online search.
Note that when any of the Polish keyboards are enabled, if I press Right Alt and letter "l" (lowercased L) rapidly twice, it will lock my screen. This does not work with Left Alt, or with any Alt when the English keyboard is enabled.