Press and hold Power button for 10–15 seconds → device shuts down.
Press Power to start it again.
When the Windows logo appears, hold Power again to force shutdown.
Repeat this 3 times.
On the 4th boot, Windows should load Windows Recovery Environment with Preparing Automatic Repair.
Then go to:
Troubleshoot → Advanced Options → Startup Repair.
Troubleshoot → Advanced Options → Uninstall Updates → Uninstall Latest Quality Update
Go back to Advanced Options → Command Prompt and run these commands one by one:
bootrec /fixmbr
bootrec /fixboot
bootrec /scanos
bootrec /rebuildbcd