https://www.theverge.com/2018/3/8/17095424/microsoft-windows-10-s-mode-free-upgrades

Microsoft confirmed yesterday it plans to move Windows 10 S from a dedicated operating system to a special “S Mode” for versions of Windows 10. In a new blog post, Microsoft’s Joe Belfiore admits that the original version of Windows 10 S, that locked a PC down to using just Windows Store apps, was confusing. “We have also heard feedback that the naming was a bit confusing for both customers and partners,” admits Befliore.

To avoid this confusion, Microsoft is now creating an S Mode for each version of Windows 10. “Starting with the next update to Windows 10, coming soon, customers can choose to buy a new Windows 10 Home or Windows 10 Pro PC with S mode enabled,” says Belfiore. It’s not clear how simply moving this Windows Store lockdown to a mode will alleviate some of the confusion around Windows 10 S, but perhaps Microsoft will make the unlock process even more obvious.