There seems to be some confusion over this - I for one don't understand it fully - but if Microsoft excludes the 1020 as a supported device, is there any point in enrolling in the Program? How did users who have installed a 10 Preview on the 1020 manage to do so? I have enrolled myself, choosing the Release Preview Ring, but it is not clear to me that that is intended for users who wish to upgrade from 8.1, or whether it's for those already running 10 who wish to download the latest builds and bug fixes. As others in this forum have noticed with their own devices, checking for software updates simply shows 'up to date'.