Microsoft keeps rolling out new preview builds for Windows 10 22H2, giving testers a chance to try out upcoming features and fixes. The latest update, Build 19045.6388, was released on September 11, 2025, to the Release Preview Channel. This build mainly offers some minor improvements and bug fixes aimed at making Windows 10 run smoother for users who want stability before a full release.

For those in the Windows Insider Program, these preview builds help shape what’s coming next. Microsoft offers different channels for testing, with the Beta and Release Preview channels being the most stable options for Windows 10 testers. The Release Preview Channel, in particular, is used for final testing just before a new update goes live to everyone.

What’s New in the Latest Builds

The most recent build, 19045.6388, has a small set of general improvements. Microsoft says it’s designed to enhance the overall experience on Windows 10 devices. These updates often include performance tweaks, security patches, and minor feature adjustments that don’t drastically change how the OS works but improve its reliability.

Before that, the build 19045.6276 came out on August 14, 2025. It introduced a new feature called Windows Backup for Organizations, which aims to make device transitions easier by providing enterprise-grade backup and restore options. It also fixed bugs like an issue where webcams wouldn’t be detected properly in Remote Desktop sessions. These small updates help keep Windows 10 stable and ready for the next big release.

Other Recent Preview Builds

Earlier builds have added features like the ability to deploy security protections through the registry, and improvements to the Windows security updates process. For example, build 19045.6156, released in July, fixed bugs that caused the Windows Extended Security Updates wizard to close unexpectedly and addressed stability issues after installing recent security updates.

In May, build 19045.5912 brought back the clock view that shows seconds and added descriptions to the weather widget on the calendar. It also fixed rendering issues with certain characters in GDI+ graphics. These incremental updates are important for polishing the OS before a broader release.

The updates also include bug fixes for issues like disappearing jump lists, problems with SSH starting, and memory leaks in media playback. For instance, the build from February fixed an issue where SSH connections would refuse to start, which is crucial for users relying on remote access tools.

How Insider Testing Works and What to Expect

The Windows Insider Program lets users test early versions of Windows 10 and provide feedback. Besides the Release Preview and Beta channels, there are also Dev and Canary channels, but Windows 10 preview builds are only available in the Beta and Release Preview channels. These are meant for users who want a balance of new features and stability.

Preview builds are rolled out gradually. Some features might still be in testing, and bugs can appear. However, Microsoft aims to fix issues quickly and deliver a smoother experience with each update. If you’re part of the Insider Program, keep an eye out for these updates to see what’s coming next for Windows 10.

In summary, the latest Windows 10 22H2 preview builds focus on small improvements and bug fixes, helping to prepare the OS for its next big release. Whether you’re a tester or just curious about what’s new, these updates show Microsoft’s ongoing effort to refine Windows 10 before it’s fully rolled out to everyone.

Inspired by

• https://www.computerworld.com/article/1687044/windows-10-insider-previews-a-guide-to-the-builds.html

Sources

• gmpg.org
• windows.com
• windows.com
• windows.com
• windows.com