Hey all, this is what I'm planning to do... I'm planning to install, fresh copies, of Window 10 rtm builds on three of my computers at home. I'm currently a Microsoft Insider person for all 3. I don't currently have a licence for any of them. Questions are... 1) How long do you think, going by past experiences, will RTM hit the timebomb? 2) I'm doing this, in hope, to get a bit cheaper Windows 8.1 licences come July 31st. Will I be able to enter a Windows 8.1 key into Windows 10 and it will then activate within Windows 10? Thanks for your help guys. Just trying to find the best way to do one nice clean install for all three without having to do it again when I get the licences.