ERROR_INVALID_PORT_ATTRIBUTES 0x80070221

Error code 545 · HRESULT 0x80070221

WINDOWS

Invalid Object Attributes specified to NtCreatePort or invalid Port Attributes specified to NtConnectPort

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_INVALID_PORT_ATTRIBUTES is a Windows error code (system error 545, returned as HRESULT 0x80070221) reported by Windows. Its official message is: “Invalid Object Attributes specified to NtCreatePort or invalid Port Attributes specified to NtConnectPort”

How to fix ERROR_INVALID_PORT_ATTRIBUTES

  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_INVALID_UNWIND_TARGETERROR_PORT_MESSAGE_TOO_LONGERROR_BAD_STACKREGDB_E_CLASSNOTREGCO_E_SERVER_EXEC_FAILUREWININET_E_TIMEOUTWININET_E_NAME_NOT_RESOLVEDWININET_E_CANNOT_CONNECT

Source: Microsoft WinError.h

Last updated: