Windows Boot Manager has been blocked by the current security policy

1

Start your laptop, just as Windows attempts to load (spinning dots), press and hold Power Button for 5 – 10 seconds to perform a Hard Shut Down

Do this twice

On the third start Windows will boot into the Recovery Environment and from there you can access System Repair, Safe Mode, Command Prompt… etc.

Go to Troubleshoot – Advanced Option – Command Prompt

Run this command and press Enter.

bootrec /FixMbr

Run this command and press Enter.

bootrec /FixBoot

Run this command and press Enter.

bootrec /ScanOs

Run this command and press Enter.

bootrec /RebuildBcd

Then reboot your System.

2

If that does not resolve the problem.

Click your Start Button, then just type msinfo and press Enter, please provide a screenshot of the resulting System Information window.