If you are seeing an error message stating that sxs.dll is "either not designed to run on Windows or it contains an error" (Error status 0xc000012f ), it typically indicates system file corruption.
Additionally, is a barrier. Correctly authoring and embedding manifests requires attention to detail. A malformed manifest can cause an application to fail to start with cryptic error messages (e.g., “The application has failed to start because its side-by-side configuration is incorrect”). Tools like sxstrace.exe help diagnose such issues, but the learning curve remains steep. Sxsi X64 Windows 10
If SFC fails, use the Deployment Image Servicing and Management tool by typing DISM /Online /Cleanup-Image /RestoreHealth in the administrator Command Prompt. If you are seeing an error message stating that sxs