RPC_S_UNSUPPORTED_TYPE 0x800706C4

Error code 1732 · HRESULT 0x800706C4

WINDOWS

The universal unique identifier (UUID) type 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_UNSUPPORTED_TYPE is a Windows error code (system error 1732, returned as HRESULT 0x800706C4) reported by Windows. Its official message is: “The universal unique identifier (UUID) type is not supported.”

How to fix RPC_S_UNSUPPORTED_TYPE

  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_UNSUPPORTED_TRANS_SYNRPC_S_UNSUPPORTED_NAME_SYNTAXRPC_S_UNSUPPORTED_AUTHN_LEVELRPC_S_INVALID_TAGRPC_S_INVALID_BOUNDRPC_S_PROXY_ACCESS_DENIED

Source: Microsoft WinError.h

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