The Windows Insider program by Microsoft allows users to sign up for early builds of the Windows operating system previously only accessible to developers. It was announced on September 30, 2014 along with Windows 10. By the end of 2014 over 1.5 million people have already installed the Windows 10 technical preview. On February 12, 2015, Microsoft used the program to deliver a preview for the mobile phone version of Windows 10. Microsoft announced that the Windows Insider program would continue beyond the official release of Windows 10 for future updates.
Windows 10 Insider preview updates are delivered to testers in different rings, Windows Insiders in the fast ring receive updates prior to Windows Insiders in the slow ring but might experience more bugs and other issues.
|Canary Ring||Not Public||Canary gets daily updates and are only accessible by Windows developers.|
|Operating System Group Ring||After the Canary Ring approves a build this one shall be spread across the OSG Ring.|
|Microsoft Ring||This is the last non-public phase and will be distributed over Microsoft itself as soon as the OSG Ring approves of a build.|
|Windows Insider Ring - Fast||Public||Windows Insiders in the Fast Ring get builds after they've been
approved by the Microsoft Ring. These ones are immediately installed. This ring has been added on October 21, 2014 with the launch of build 9860.
|Windows Insider Ring - Slow||If there are no issues in the previous ring then these ones will also be shipped to the Slow Ring. This is the default option for consumer versions of Windows Insider Preview.|