The crux is you have two choices (plus one): Stay with the inside Program and get Win 10 for free – Continue as a Windows Insider and keep getting preview builds after 7/29 – This will keep you on a Preview OS, but even if you didn’t have a previous Windows install (version 7 or 8.1). Or… Read More Demystified – The real deal on Windows 10 – Who Stays on Preview, Who Gets the Release Build, Who Reverts to their Previous Version.