How to solve "Error 1923" and "Error 1939"
Some users may encounter the error Error 1923: Verify that you have sufficient privileges to install system services and/or Error 1939 when they attempt to update or install the Intel® Killer Control Center.
To resolve this issue, you need to uninstall the old version of the Intel Killer Control Center, remove the service, and then rerun the installer.
See the guide on how to perform a clean install of the latest Intel Killer Control Center.