If Windows or Linux fails to boot, the EFI Shell allows manual loading of the OS loader:
EFI Shell version 2.60 is not a consumer software product for review, but rather a pre-boot command-line environment
A concise, practical reference for the EFI (UEFI) Shell version "260_512_2021" — commands, syntax, file operations, scripting, environment variables, boot manager interactions, and common troubleshooting.
fs0: cd EFI\Microsoft\Boot bootmgfw.efi