RPC_S_DUPLICATE_ENDPOINT 0x800706CC

Error code 1740 · HRESULT 0x800706CC

WINDOWS

The endpoint is a duplicate.

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_DUPLICATE_ENDPOINT is a Windows error code (system error 1740, returned as HRESULT 0x800706CC) reported by Windows. Its official message is: “The endpoint is a duplicate.”

How to fix RPC_S_DUPLICATE_ENDPOINT

  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_UUID_NO_ADDRESSRPC_S_UNKNOWN_AUTHN_TYPERPC_S_MAX_CALLS_TOO_SMALLSTATUS_STACK_OVERFLOWSTATUS_DLL_NOT_FOUNDSTATUS_ENTRYPOINT_NOT_FOUNDSTATUS_DLL_INIT_FAILEDSTATUS_HEAP_CORRUPTION

Source: Microsoft WinError.h

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