RPC_S_PROTSEQ_NOT_SUPPORTED 0x800706A7

Error code 1703 · HRESULT 0x800706A7

WINDOWS

The RPC protocol sequence is not supported.

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_PROTSEQ_NOT_SUPPORTED is a Windows error code (system error 1703, returned as HRESULT 0x800706A7) reported by Windows. Its official message is: “The RPC protocol sequence is not supported.”

How to fix RPC_S_PROTSEQ_NOT_SUPPORTED

  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_PROTSEQ_NOT_FOUNDRPC_S_INVALID_BINDINGRPC_S_INVALID_RPC_PROTSEQRPC_S_WRONG_KIND_OF_BINDINGERROR_BAD_NETPATHERROR_BAD_NET_NAMEERROR_INVALID_PARAMETERERROR_DISK_FULL

Source: Microsoft WinError.h

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