When is a clean reinstallation of Windows 8 the necessary step to resolve error 0xc00000d?

A clean reinstallation of Windows 8 becomes necessary for error 0xc00000d when all other troubleshooting steps (BCD repair, disk checks, system restore) have failed to resolve the issue. This typically indicates severe corruption of system files beyond repair, or a persistent problem with the operating system that cannot be fixed through standard means. Always back up your data before performing a clean reinstallation.