RPC_S_INVALID_TAG 0x800706C5

Error code 1733 · HRESULT 0x800706C5

WINDOWS

The tag 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_TAG is a Windows error code (system error 1733, returned as HRESULT 0x800706C5) reported by Windows. Its official message is: “The tag is invalid.”

How to fix RPC_S_INVALID_TAG

  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_BOUNDRPC_S_INVALID_NAME_SYNTAXRPC_S_INVALID_NETWORK_OPTIONSRPC_S_INVALID_AUTH_IDENTITYRPC_S_UNSUPPORTED_TYPERPC_S_NO_ENTRY_NAMERPC_S_UNSUPPORTED_TRANS_SYN

Source: Microsoft WinError.h

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