Update windows operationg system on your Lumia phone and create a Custom ROM with Root Access is easy to do with this software. Connect the phone to the computer and this tool will automatically identify your phone type.
Download this tool and read "Getting Started" to get more usage information.
|Compatibility||Windows 7, 8, 8.1, and 10.|
Installation is not needed, just extract and run as administrator WPinternals.exe.