Try booting your machine with Windows 10 installation media
At the Install screen, click on "Repair" on the lower left.
Then Troubleshoot.
Advanced.
Command Prompt with Admin.
Select Command Prompt and type in the following:
bcdedit /deletevalue {default} safeboot
If that gives an error, use:
bcdedit /deletevalue {current} safeboot
At the Install screen, click on "Repair" on the lower left.
Then Troubleshoot.
Advanced.
Command Prompt with Admin.
Select Command Prompt and type in the following:
bcdedit /deletevalue {default} safeboot
If that gives an error, use:
bcdedit /deletevalue {current} safeboot