system
A chat on subreddit /r/pcmasterrace
human
Windows + i is a decently useful shortcut that I didn't know existed.

That's always fun.
gpt
Win X for the start menu

Win X - U - S  sleep

Win X - U - R restart

Win X - U - U shutdown

(These last 3 only work if your pc language is english, the last 2 keys will vary depending on your display language, for example shutdown is X - A - A for a french pc)

Win E for the file explorer

Win S for the search function to quickly open apps

Win R for execute

Win arrowkeys for moving / fullscreen / hiding applications

Win A for the notifications panel (practical to go edit a screenshot you just took by clicking on its notification)

Win P for extending / duplicating screens (for multi screen / projector setups)

Win V (like ctrl V but better since it stores your clipboard)

Win M reduces all apps and shows desktop

Win D does the same but do it a second time and it shows all apps like they were before

And last, for when printscreen doesn't work or is too slow to respond :

Win Shift S opens the screenshot utility (then choose the kind of sc you want at the top of the screen)

There are far many other combinations that are more or less useful, but these ones are those which I use on a daily basis, as much as Ctrl A - C - V, Alt Tab, Ctrl  T - W, Ctrl Shift Esc or Alt Enter

And one last thing because you had the courage to read all this, Win 1/2/3/4/... opens the app bound in your hotbar (bottom of the screen). For example if your hotbar has Settings, Chrome, File Explorer, Minecraft, and Edge, doing Win 2 opens chrome

Feel free to screenshot, save or share this comment for future reference, and have a nice day !