With Windows 10 Redstone 4 nearly finalized, Microsoft is now preparing to begin develop the very next Windows 10 release, which are internally codenamed Redstone 5.

Hence, the very first build is already spotted online, with Microsoft proclaiming that the Redstone 5 preview program will start off very soon, simply not this week.

Windows 10 Redstone 4, which doesn't yet receive an official name but that will be called by Microsoft "Windows 10 Spring Creators Update," is predicted to be finalized in March, over public launch in April.

Meanwhile, Redstone 5 arrives in the fall, with a October target date in your production ring, while insiders is deserving of the final build 1 month earlier.
"Skip Ahead insiders to purchase RS5 builds"

The first builds rrs going to be shipped to insiders that will be enrolled in the Skip Ahead ring and won't are preloaded with any breaking changes. Skip Ahead was the special ring released by Microsoft before launch of Windows 10 Redstone 4 so when the company was giving the finishing touches to Redstone 3, as well as software giant put on the extender as a way to let insiders consider the next-next update early.

Throughout its launch, Skip Ahead sported limited seats, and whoever isn't already some of it won't be able to register while in the coming days and weeks. Which means that the first Windows 10 Redstone 5 builds are only shipped up to a limited audience, although goes without saying so it shouldn't take long in the event the release of Redstone 4 in the spring until other people gets it.

Also, it's important to note that the first Windows 10 Redstone 5 build won't bring several changes and extra features are very unlikely, so considering you're not gonna miss anything if you're not decided upon Skip Ahead.

Depending on BuildFeed, the first Windows 10 Redstone 5 build published by Microsoft is 17600, so develop this has started internally and also such builds has to be spotted online any longer.