Windows Update KB5065789: Everything You Need to Know About the Latest Windows 11 Preview

Microsoft rolls out the September 2025 preview update with 41 changes and fixes, but not without installation hurdles for some users.

Microsoft has released KB5065789, an optional preview update for Windows 11 versions 24H2 and 25H2, bringing a host of improvements and fixes ahead of next month's Patch Tuesday. This update, dated September 29, 2025, elevates the OS Build to 26100.6725 and introduces several notable enhancements while addressing various issues.

What is KB5065789?

KB5065789 is an optional cumulative preview update for Windows 11 version 24H2 (and also applicable to 25H2). As a non-security preview release, it allows users to test upcoming features and fixes before they become part of the mandatory monthly security update.

Key characteristics:

• Release Date: September 29, 2025
• OS Build: 26100.6725
• Update Type: Optional Preview (non-security)
• Versions: Windows 11 24H2 and 25H2

Major Changes and Improvements

This update packs 41 changes and fixes across various Windows components. While Microsoft hasn't released exhaustive documentation on every change, several key improvements have been identified:

Gaming and Media Enhancements

The update addresses system gaming and media issues, though specific details remain sparse. According to community discussions, it targets performance and compatibility improvements in multimedia scenarios.

AI Actions and UI Tweaks

Microsoft has introduced new AI-related functionality and user interface refinements. While exact details aren't fully documented, these changes likely represent incremental improvements to Windows 11's AI capabilities and visual consistency.

Security Improvements

Although primarily a non-security update, it includes improvements that address security vulnerabilities, including CVE-2025-50173.

Known Issues

Users should be aware of several known issues with this update:

1. Protected Content Playback Problems
   Some users may experience issues playing protected content in certain BluRay/DVD/Digital TV applications after installing this update.
2. Installation Failures
   A number of users have reported installation failures with various error codes, including:
   • 0x800f081f (denotes missing files in the component store)
   • 0xc1900101 (a generic installation error)

Troubleshooting Installation Issues

If you encounter problems installing KB5065789, several solutions are available:

Solution 1: Skip the Preview Update

Since this is an optional preview update, you can simply choose not to install it. To turn off preview updates:

1. Go to Settings > Update & Security > Windows Update
2. Next to "Get the latest updates as soon as they're available", set the toggle to Off.

Solution 2: Run DISM Tool

For error code 0x800f081f, run the Deployment Imaging Service and Management Tool:

DISM /Online /Cleanup-Image /RestoreHealth

This command checks for and repairs component store corruption.

Solution 3: Repair Installation

For persistent issues, consider a repair installation:

1. Go to Settings > System > Recovery
2. Under "Fix problems using Windows Update", select "Reinstall now"
3. This keeps your files, apps, and settings intact.

Should You Install This Update?

To help you decide, here's a quick comparison:

Note: As a preview update, KB5065789's features will be included in the upcoming October 2025 monthly quality update. If you prefer stability over bleeding-edge features, you might want to wait.

What's Next?

Microsoft typically incorporates preview update changes into the next month's mandatory cumulative update. Therefore, the improvements in KB5065789 will likely be part of the October 2025 Patch Tuesday update.

For users experiencing issues, Microsoft has already released an out-of-band update (KB5068221) on September 22, 2025, to address some problems.

Conclusion

Windows Update KB5065789 represents Microsoft's continuous effort to refine Windows 11 through incremental improvements. While it brings valuable enhancements, particularly in gaming and media functionality, its optional nature and known issues mean users should carefully consider whether to install it immediately.

For most users: Waiting for the next mandatory monthly update might be the wisest choice.

For enthusiasts and those experiencing specific issues: This preview update might offer welcome relief—provided you're prepared to troubleshoot potential installation problems.

Have you installed KB5065789? Share your experience in the comments below!