Microsoft lets developers test their not yet released "Windows 10 S"

Microsoft is releasing Windows 10 S, a new Windows version designed to run Windows Store apps only, to MSDN subscribers today. The new operating system will be available in an ISO file format so developers can download and install it to test their apps on it. Basically, Microsoft wants education-focused developers to properly test Windows 10 S to make sure it’s ready for that audience. This is also a first step towards making Windows 10 S more broadly available to schools, as Microsoft promised back in May.

At the mean time anyone with an MSDN subscription will be able to download and test Windows 10 S now, Microsoft still isn’t making it available directly to consumers to update to. It’s unlikely we’ll see that change, but Microsoft is making an Update Assistant Tool available next week that will include Windows 10 S.