Microsoft revealed yesterday that it will kill old Windows 10 Insider versions that are expired so that devices won't boot killed builds anymore.



From gHacks:

The company's Insider program is designed to give users and companies a chance to test new builds of the Windows 10 operating system before they become available on the stable channel, and to provide Microsoft with data that it can use to fix or modify features.

Insiders can upgrade to the next build whenever it becomes available. All Insider Builds have an expiration date associated with them after which the copy expires.

  Microsoft Kill Switch for Windows 10 Insider versions