You need to update to the latest builds, Microsoft says
Microsoft launched the very first Windows 10 Technical Preview build in early October 2014, and since then, the company has updated it several times, launching not only new versions but also plenty of improvements supposed to provide us with a glimpse into the feature lineup of Windows 10.
In an announcement on the Insider Hub, Microsoft warns that old versions of Windows 10, including build 9841, 9860, and 9879, expire today, so all those who are still running these need to update to a newer version if they want to continue using the technical preview.
