Five Windows shortcuts which you should definitely know
Windows + Ctrl + Shift + B
If your PC or laptop hangs again and again, then pressing below shortcut refresh it completely without shutting down.
Window + Shift + S
you can take a screenshot, You can also take a screenshot of a specific area or full screen.
Window + H
Express turns on voice typing, so you can type everything by speaking and number
Windows + Alt + R
you can do direct screen recording, that too without any software and number five will be useful
Windows + X + U(two times)
Direct restart your PC.