Bit of a random question...
On my Windows 10 computer, I deleted a file from the desktop. I realised I'd deleted the wrong file, so I immediately hit Ctrl+Z which I know Windows supports for undoing actions in Explorer. However, nothing happened. I right-clicked on the desktop, and selected Undo from the context menu, and the file returned as expected.
It seems that after I deleted the file, the focus was no longer on the desktop. I tried again - deleting a file, and immediately using the up/down/left/right keys, and hitting spacebar. Nothing seems to happen. I'm curious - where is the focus at this point in time? Are my keystrokes being sent anywhere, maybe without me realising?