RPC_S_UNSUPPORTED_AUTHN_LEVEL 0x8007071D

Error code 1821 · HRESULT 0x8007071D

WINDOWS

The requested authentication level 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_AUTHN_LEVEL is a Windows error code (system error 1821, returned as HRESULT 0x8007071D) reported by Windows. Its official message is: “The requested authentication level is not supported.”

How to fix RPC_S_UNSUPPORTED_AUTHN_LEVEL

  1. Run the affected program as administrator (right-click → Run as administrator)
  2. Check permissions on the target resource: Properties → Security → your account
  3. Check Event Viewer → Windows Logs → Security for the matching audit entry

Related errors

RPC_S_UNSUPPORTED_NAME_SYNTAXRPC_S_UNSUPPORTED_TYPERPC_S_UNSUPPORTED_TRANS_SYNRPC_S_COMM_FAILURERPC_S_NO_PRINC_NAMERPC_S_BINDING_INCOMPLETE

Source: Microsoft WinError.h

Last updated: