In “Advanced Options” click on “Startup Settings” and select “Enable Safemode” and see if it boots up.
If it does problem is minor. Try rebooting and if still a problem then use “System Restore” from the “Advanced Options” .
Worked on my computer this morning.
You can try changing the order above to “System Restore” and if it doesn’t work then “Enable Safemode” and reboot.
If it boots to the Desktop O.K then just reboot normally.
Good luck.