KB5065431, the latest security update for Windows 11 23H2 devices, is now being rolled out, serving as a reminder of the approaching end of life for this version on November 11, 2025. After this date, users can expect no further extensions or security updates, making the transition to Windows 11 24H2 a prudent decision.
Microsoft has initiated the migration of eligible 23H2 PCs, specifically the Home and Pro editions, to the Windows 11 24H2 version as part of a phased rollout. This delay in the upgrade process is understandable, given that a series of errors—reportedly around a dozen—surfaced following the release of 24H2. Some of these issues were linked to app vendors who had not yet updated their applications to be compatible with the latest version of Windows 11, while others stemmed from OS features that caused system malfunctions during the upgrade.
In light of these complications, Microsoft temporarily paused the rollout of the 24H2 upgrade for affected devices until the issues were addressed. Fortunately, most of the barriers to upgrading have now been resolved, allowing the automatic upgrade process to commence. For those who choose to remain on 23H2, it’s worth noting that this may not be the best course of action, as upgrading to 24H2 offers enhanced security and improved app compatibility.
It’s important to mention that the Enterprise and Education editions of Windows 11 23H2 have an extended support timeline, with their end of life set for November 10, 2026.
The Windows 11 KB5065431 update is part of the September 2025 Patch Tuesday and will automatically install on your PC. If it does not, users can utilize Microsoft’s offline update installer file (.msu) to facilitate the installation. Before delving into the specifics of the issues addressed by this update, let’s explore the download links.
Download Links for Windows 11 KB5065431
Windows 11 KB5065431 Direct Download Links: 64-bit and Arm | Microsoft Update Catalog.
After downloading the .msu file, run it and allow some time for the update to apply, as manual installations can take a bit longer.
What’s new in Windows 11 Build 22631.5909?
For those curious about new features, the Windows 11 22631.5909 build does not introduce any new functionalities, but it does include several important fixes. Notably, the update addresses the NDI streaming performance issue, ensuring that users will no longer experience audio delays or video performance problems.
Another significant fix pertains to a new security feature introduced with the August 2025 security update, which requires the User Account Control (UAC) prompt for administrator credentials during Windows Installer (MSI) repair and related operations. Standard users without admin rights will encounter this prompt when attempting to run applications like AutoCAD or during installation or repair tasks. While this is a security enhancement, administrators have the option to disable the UAC prompt via group policy.
Additionally, Windows 11 KB5065431 enhances security for SMB shares and introduces an SMB client compatibility audit feature. All previous security update issues have been addressed with this release, and ongoing research will continue to identify any new concerns that may arise.
