winload.efi Missing or Corrupt: Read the Code, Then Rebuild the Boot Files
A winload.efi error is Windows Boot Manager saying it cannot find, read or trust the OS loader. How to read the error code, the four causes in order of likelihood, and the repair ladder from WinRE with bcdboot, bootrec and sfc, plus the Secure Boot certificate change that now breaks old boot media.
Dmytro Koval · Oct 14, 2026255