Microsoft is taking its time with the boot certificate rollout, but you don't have to. Activate the latest UEFI CA 2023 right now.

Ensure your PC boots safely before Secure Boot changes.

Your PC's critical security certificates may be about to expire - how to check ...

There are various reasons why Windows does not start. The first assumption is a defect in the boot environment that prevents the system from starting. However, causes can also be a defective file ...