Try resetting your BIOS defaults:
https://www.groovypost.com/howto/reset-pc-bios-...
If that does not work and you have a desktop computer...
Power down
Unplug it
Open the system unit
Remove the CMOS CR-2032 chip
Plug it in, start the machine, wait 10 seconds
Power down, unplug it, reinstall the CMOS CR-2032 chip
Plug it in again, power up
See if it boots into the recovery environment.
Click Troubleshoot
Click Advanced Options
Click System Restore, see if you can go back to an earlier time.
If not, boot into the recovery environment again, then try performing a startup repair.
If that does not work, boot into the recovery environment, then click 'Go back to previous version of Windows'
If that does not work.
Go to a working computer, download, create a bootable copy, then perform a clean install.
Step 1: How to download official Windows 10 ISO files
[http://answers.microsoft.com/en-us/windows/wiki...](http://answers.microsoft.com/en-us/windows/wiki/windows_10-windows_install/how-to-download-official-windows-10-iso-files/35cde7ec-5b6f-481c-a02d-dadf465df326)
Step 2: How to: Perform a clean install of Windows 10
[http://answers.microsoft.com/en-us/insider/wiki...](http://answers.microsoft.com/en-us/insider/wiki/insider_wintp-insider_install/how-to-do-a-clean-install-of-windows-10/aef0ae63-2117-41ee-a8ea-4a3181625b08)
If there are files on the drive you want to recover, see - How to: Perform a Custom install of Windows 10
[http://answers.microsoft.com/en-us/insider/wiki...](http://answers.microsoft.com/en-us/insider/wiki/insider_wintp-insider_install/how-to-do-a-custom-installation-of-windows/38adfa8c-32f8-4354-8c53-13b5f2cf7e44)