RPC_S_INVALID_ENDPOINT_FORMAT 0x800706AA

Error code 1706 · HRESULT 0x800706AA

WINDOWS

The endpoint format is invalid.

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

RPC_S_INVALID_ENDPOINT_FORMAT is a Windows error code (system error 1706, returned as HRESULT 0x800706AA) reported by Windows. Its official message is: “The endpoint format is invalid.”

How to fix RPC_S_INVALID_ENDPOINT_FORMAT

  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

RPC_S_INVALID_NET_ADDRRPC_S_INVALID_STRING_UUIDRPC_S_INVALID_RPC_PROTSEQRPC_S_INVALID_TIMEOUTRPC_S_NO_ENDPOINT_FOUNDRPC_S_PROTSEQ_NOT_SUPPORTEDRPC_S_INVALID_BINDING

Source: Microsoft WinError.h

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