Ah, sorry, my bad, it should have been "Escape" instead of ~"Windows key"~.
`Alt + Escape`, that is. Thanks for pointing it out. Corrected.
(You see, I almost never use this shortcut directly, b/c I only exploit it in those AHK scripts to do the "to previous" flip without doing any additional persistence or querying in the script, so I messed up when recalling it. In fact I thought it was `Win+Escape`, tried it, found out it was `Alt+Escape` instead, and then finally wrote `Alt+Win`. Bad braining today.)
Pressing alt + win key does nothing for me on this Windows 10 machine.