ERROR_DS_NCNAME_MUST_BE_NC 0x800720A5

Error code 8357 · HRESULT 0x800720A5

WINDOWS

The object must be a naming context.

Windows troubleshooting diagram: Device Manager warning and a system file scan
Windows errors: check drivers, system files and Event Viewer, in that order.

What it means

ERROR_DS_NCNAME_MUST_BE_NC is a Windows error code (system error 8357, returned as HRESULT 0x800720A5) reported by Windows. Its official message is: “The object must be a naming context.”

How to fix ERROR_DS_NCNAME_MUST_BE_NC

  1. Reboot once — many one-off system codes disappear with a clean restart
  2. Repair system files: 'sfc /scannow' then 'DISM /Online /Cleanup-Image /RestoreHealth'
  3. Find the source in Event Viewer → System: filter for this exact code and open its provider link

Related errors

ERROR_DS_NCNAME_MISSING_CR_REFERROR_DS_CANT_ADD_SYSTEM_ONLYERROR_DS_SUBREF_MUST_HAVE_PARENTERROR_DS_CLASS_MUST_BE_CONCRETEERROR_DS_NO_DELETED_NAMEERROR_DS_SEC_DESC_INVALIDERROR_DS_INVALID_DMD

Source: Microsoft WinError.h

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