GRUB is now running on Windows on ARM tablets (Works on Surface RT, Surface RT 2, Lumia 2520, and Asus VivoTab RT)http://lucasm.cf/?ndrlnhttp://lucasm.cf/?ztcxmIf anyone wants to help out more, see https://rol.im/chat/rtchurch -- you can get a .zip file to make a GRUB bootable USB here too (obviously, you need the secure boot policy installed).