Microsoft has officially announced that Windows 10 S users can now opt for Windows Insider Program. Previously Windows 10 S users managed to get insider builds but this is the first time Microsoft announced their insider program for Windows 10 S officially. If you are a Windows 10 S user then you can simply go to settings app and from there register for the insider builds. However if you are on Windows 10 Pro or Enterprise and want to try out Windows 10 S then you need to use Windows 10 S installer.
Windows 10 S brings the experiences Windows users know and love, streamlined for security and performance. By exclusively using apps in the Windows Store and ensuring that you browse safely with Microsoft Edge and keeps you running fast and secure. It is ideal for people who have everything they need in the Windows Store and prefer the peace of mind of secure and verified Windows Store applications. Windows Insiders can try Windows 10 S on their PCs and join the Windows Insider Program via Settings > Update & security > Windows Insider Program to receive Insider Preview builds for Windows 10 S just as they would on other editions of Windows 10.
This Windows 10 S setup tool installs a new edition of Windows (i.e. new build, no data migration) and will only work on PCs running either the Windows 10 Pro or Windows 10 Enterprise editions.
Important links and information you should read *before* installing Windows 10 S on your PC: