ERROR_DS_RECALCSCHEMA_FAILED 0x800720CC

Error code 8396 · HRESULT 0x800720CC

WINDOWS

Schema update failed in recalculating validation cache.

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_RECALCSCHEMA_FAILED is a Windows error code (system error 8396, returned as HRESULT 0x800720CC) reported by Windows. Its official message is: “Schema update failed in recalculating validation cache.”

How to fix ERROR_DS_RECALCSCHEMA_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_EXISTS_IN_POSS_SUPERROR_DS_TREE_DELETE_NOT_FINISHEDERROR_DS_CANT_DELETEERROR_DS_EXISTS_IN_SUB_CLSERROR_DS_EXISTS_IN_AUX_CLSERROR_DS_ATT_SCHEMA_REQ_IDERROR_DS_BAD_RDN_ATT_ID_SYNTAX

Source: Microsoft WinError.h

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