RPC_S_PROTOCOL_ERROR 0x800706C0

Error code 1728 · HRESULT 0x800706C0

WINDOWS

A remote procedure call (RPC) protocol error occurred.

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_PROTOCOL_ERROR is a Windows error code (system error 1728, returned as HRESULT 0x800706C0) reported by Windows. Its official message is: “A remote procedure call (RPC) protocol error occurred.”

How to fix RPC_S_PROTOCOL_ERROR

  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_SERVER_UNAVAILABLERPC_S_CALL_FAILED_DNERPC_S_PROXY_ACCESS_DENIEDERROR_GEN_FAILUREERROR_SHARING_VIOLATIONERROR_BAD_NETPATHERROR_BAD_NET_NAMEERROR_INVALID_PARAMETER

Source: Microsoft WinError.h

Last updated: