For Windows 8.0/8.1 RT, another jailbreak exists thanks to Myriachan from XDA. You can find this jailbreak in the repo, or you can find on XDA -- http://forum.xda-developers.com/windows-8-rt/rt-development/jailbreak-exploit-released-t3225051.
Several users found this limiting, leading to the concept of "jailbreaking" Windows RT 8.1 in order to unlock the potential of their devices, such as the Microsoft Surface RT.
An all-in-on package for Tegra based Windows RT tablets (ASUS VivoTab RT, Lenovo IdeaPad Yoga 11, Microsoft Surface RT & Microsoft Surface 2) which will enable them to run third party applications under Windows RT or to boot alternative operating syst
Boot your RT device and log in, allow it to sit on the desktop for about a minute. Extract all files out of the latest version of the .ZIP attached to this post. To do this on Windows RT, right-click on the .zip, choose 'Extract all', and select t
We could theoretically patch around the restriction with the aforementioned kernel debugger or with a testsigned kernel-mode driver, but if we could put RT into Testsigning or use a KD on it we wouldn't need anything else at all anyhow; either of thos