We know that Windows Phone is the most secured mobile operation system, however recently a new tool emerged called Windows Phone internals. The tool allows to enable Root Access on the phone or create and flash Custom ROM’s after unlocking the Bootloader
Now a XDA hacker Wack0Distractor, installed Windows RT 8.1 WinPE on his Lumia 520. The XDA member said that the touchscreen is not working on Lumia 520 and there some more drivers issues remained. However he did not provide the tutorial to install Windows RT 8.1 on Lumia 520.
If you don’t know Windows Phone internals tool can also create backup-images of the phone and access the file-system in Mass Storage mode. The tool supports most versions of Windows Phone 8.1 and Windows 10 Mobile.
Source: XDA Forum