Windows Boot Manager has been blocked by the current security policy

If Windows Boot Manager has been blocked by the current security policy, reset BIOS to its default settings, check the Secure ...
The Windows Club

Secure Boot state off in System Information, but on in BIOS

Use the following fixes if the Secure Boot state is OFF in System Information, but ON in BIOS. Check the Secure Boot status again in BIOS Change your BIOS mode and restore the factory keys Reset your ...
Ars Technica

Microsoft’s Secure Boot has been broken for a decade and no one noticed until now

An industry-wide standard Microsoft invented to protect Windows, and later Linux, devices from firmware infections has been trivial to bypass for 13 of its 14 years of existence. The discovery was ...