Shortcut To Minimize All Windows
To Minimize All Windows in Windows 10, the keyboard shortcut is
Windows Key + M.
This keyboard shortcut lets you minimize all your windows at once, to bring them back, press
Windows Key + Shift + M.
If you press
Windows Key + Home, it will minimize all windows other than the currently active window.
There is a taskbar shortcut, the Show desktop button at the far right of the taskbar (very hard to see).
If you click the Show Desktop button (keyboard shortcut which is Windows key + D), it will minimize all windows. Click the button again to restore all windows.