I press the function key shortcut for projecting display on other devices. A window from left-hand side opens up. I select 'PC Screen Only' by clicking on that option or by pressing 'Enter' key. Nothing happens. I have to press the function key shortcut again to get rid of that popup/window containing all the options. Earlier, I remember, on selecting 'PC Screen Only' option, the window used to go away into the left side of the PC window.

I am concerned because lately when I try to end the screensaver by pressing any key or touchpad, Or when I try to lock the windows by pressing 'Window key + L', momentarily the same window/popup(for display projection) shows up. I obviously suspect that these two problems are related.

Any help will be appreciated, thanks.