Windows 10: Alt+shift with F4

When I press on Alt + shift and F4 icons on desktop disappear and can't use right click on desktop , and i must restart the computer is this option to lock the desktop ? and if there is way to unlock again the desktop please let me know .

:)

 

Alt f4 not working

Can't use "alt+f4" shortcut.

When i enter alt+f4, the pop up box says "The item KHATRA.exe that this shortcut refers to has been changed or moved, so this shortcut will no longer work properly"

 

Alt-F4 produces playlists

Every time I use ALT-F4 for a current window it produces "Playlists" for music.

Won't behave as before closing current window.

How do I change back to normal ALT-F4 behavior?

I did attempt to change things from Control Panel\All Control Panel Items\Ease of Access Center but none of the settings have effected ALT-F4.

 

Alt-F4 produces playlists

Hmh.. strangely enough, there actually is a playlist on Spotify named "alt F4": alt F4 on Spotify

But anywho, you wouldn't happen to have some sort of macro program open? Macro programs allow certain key functions to do other behaviors. For example, Alt+F4 can be redirected to do other functions (such as creating a new playlist).
I use Macro Express and have it running all the time.