ERROR_DS_SCHEMA_ALLOC_FAILED 0x800720DF

Error code 8415 · HRESULT 0x800720DF

WINDOWS

Schema allocation failed. Please check if the machine is running low on memory.

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_SCHEMA_ALLOC_FAILED is a Windows error code (system error 8415, returned as HRESULT 0x800720DF) reported by Windows. Its official message is: “Schema allocation failed. Please check if the machine is running low on memory.”

How to fix ERROR_DS_SCHEMA_ALLOC_FAILED

  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_SCHEMA_NOT_LOADEDERROR_DS_SCHEMA_UPDATE_DISALLOWEDERROR_DS_ATT_SCHEMA_REQ_SYNTAXERROR_DS_GCVERIFY_ERRORERROR_DS_SECURITY_CHECKING_ERRORERROR_DS_NCNAME_MISSING_CR_REFERROR_DS_DRA_SCHEMA_MISMATCH

Source: Microsoft WinError.h

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