As the development of each new version of Windows 10 draws to a close, we enter a special period of time I call the “magic window.” During this time period, Windows Insiders who are testing this next Windows version can un-enroll their PCs from the program without penalty, and just continue receiving updates for what is now the shipping version of Windows 10.

As I’ve explained in the past, users who enroll a PC in the Windows Insider program’s Fast or Slow rings is typically “stuck” in one of those pre-release build rings. You can slow things down—get in the Slow ring—or speed things up—with Fast—but you can’t get out.

But then the magic window occurs.

And that just happened for Redstone 4 (Windows 10 version 1803), assuming you’re in the Fast ring. With today’s release of Windows 10 build 17133.1, Redstone 4 development is essentially complete. And this build (plus or minus some additional small updates) will be heading out to the public starting in early April. Which means that we’re the magic window time period.

And that means that you could enroll your PC in the Fast ring today, install build 17133.1, and the un-enroll the PC from the Windows Insider program entirely. No harm, no foul.

The only questions now involve timing. When will the Slow ring get this build? Because at that point, they too can simply un-enroll from the Insider program. And when will the magic window close? That last one is a big unknown, but Microsoft usually issues a warning before it happens. If you miss out on the magic window, your PC will soon be pushed into Redstone 5 development. Which you may or may not want, especially early on.

If you are an Insider in the Fast ring, here’s how you can take advantage of the magic window and get your PC on the normal updating schedule:

• Upgrade the PC to build 17133.1.
• Open Settings and navigate to Update & Security.
• Open Windows Insider Program.
• Click the “Stop Insider Preview builds” button.
• In the full-screen Stop getting insider content notification, select the last item (“Stop Insider builds completely”).
• Click Confirm.
• Click Restart Now.

Voila. You are free.