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0x8007007FSystemHigh

Error 0x8007007F — Procedure Not Found (ERROR_PROC_NOT_FOUND) | Windows System Error Fix

Windows 11Windows 10Windows 8.1

What Does 0x8007007F Mean?

The specified procedure could not be found in the DLL.

Real-World Causes

  1. 1DLL version mismatch — the installed version is too old
  2. 2Application compiled against a newer version of the DLL
  3. 3DLL was replaced by an incompatible version from another installer
  4. 4System DLL was corrupted

Symptoms

  • ⚠Application fails to start with 'procedure not found' error mentioning a DLL and function name
  • ⚠Specific API function name is shown in the error
  • ⚠Error appears after updating or installing other software
  • ⚠Windows features fail to work

DIY Fix

Beginner-friendly steps you can try at home

  1. 1Reinstall the failing application
  2. 2Install or repair Visual C++ Redistributable packages
  3. 3Uninstall recently installed software that may have overwritten the DLL
  4. 4Run 'sfc /scannow' to restore system DLLs

Advanced Fix

For experienced users and IT professionals

  1. 1Use Dependency Walker to verify the DLL version and exported functions
  2. 2Replace the DLL from the correct installer or Windows installation media

Frequently Asked Questions

How is this different from module not found?
Module not found (0x8007007E) means the DLL file is entirely missing. Procedure not found (0x8007007F) means the DLL exists but does not contain the specific function the application needs, usually due to a version mismatch.

Related Error Codes

0x8007007EModule Not Found (ERROR_MOD_NOT_FOUND)0x800700C1Bad EXE Format (ERROR_BAD_EXE_FORMAT)

About the Author

Windows Troubleshooting Team

Verified against official Microsoft documentation and real-world diagnostic data. Error behavior confirmed across Windows 10, Windows 11, and Windows Server.