ERROR_NULL_LM_PASSWORD 0x80070518

Error code 1304 · HRESULT 0x80070518

WINDOWS

The password is too complex to be converted to a LAN Manager password. The LAN Manager password returned is a NULL string.

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_NULL_LM_PASSWORD is a Windows error code (system error 1304, returned as HRESULT 0x80070518) reported by Windows. Its official message is: “The password is too complex to be converted to a LAN Manager password. The LAN Manager password returned is a NULL string.”

How to fix ERROR_NULL_LM_PASSWORD

  1. Run the affected program as administrator (right-click → Run as administrator)
  2. Check permissions on the target resource: Properties → Security → your account
  3. Check Event Viewer → Windows Logs → Security for the matching audit entry

Related errors

ERROR_LOCAL_USER_SESSION_KEYERROR_UNKNOWN_REVISIONERROR_NO_QUOTAS_FOR_ACCOUNTERROR_SERVICE_DISABLEDERROR_SERVICE_DEPENDENCY_FAILERROR_DLL_INIT_FAILEDERROR_IO_DEVICEERROR_NOT_FOUND

Source: Microsoft WinError.h

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