ERROR_UNRECOGNIZED_MEDIA 0x800706F9

Error code 1785 · HRESULT 0x800706F9

WINDOWS

The disk media is not recognized. It may not be formatted.

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_UNRECOGNIZED_MEDIA is a Windows error code (system error 1785, returned as HRESULT 0x800706F9) reported by Windows. Its official message is: “The disk media is not recognized. It may not be formatted.”

How to fix ERROR_UNRECOGNIZED_MEDIA

  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_UNRECOGNIZED_VOLUMEERROR_INVALID_USER_BUFFERERROR_NO_TRUST_LSA_SECRETRPC_X_BAD_STUB_DATAWU_E_UH_INSTALLERFAILUREWU_E_DM_NOTDOWNLOADEDWU_E_SERVICE_STOPSL_E_INVALID_PRODUCT_KEY

Source: Microsoft WinError.h

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