Microsoft has released the final non-security preview update for Windows 10, version 22H2, which includes fixes for the out-of-box experience and SMBv1 protocol connectivity.
This is an optional cumulative update that delivers updates at the end of each month, allowing Windows administrators to test improvements and bug fixes that will roll out to all users during the next month's Patch Tuesday release.
KB5066198 addresses a known issue privately acknowledged by Microsoft last week that impacts those connecting to SMBv1 shares over the NetBIOS over TCP/IP (NetBT) networking protocol after installing the September 2025 KB5065429 security update.
It also resolves an issue when using Windows Autopilot to deploy Windows 10 22H2 to devices where Enrollment Status Page (ESP) is enabled, if the ESP doesn't load during the Out-of-Box Experience (OOBE).
To install today's preview update, go to 'Windows Update' and click 'Check for Updates.' Because this is an optional update, you will also be asked to confirm if you want to install it by clicking a 'Download and install' link. Windows 10 users can also install KB5066198 manually after downloading it from the Microsoft Update Catalog.
Once installed, the September 2025 non-security update improves the servicing stack, the component responsible for installing Windows updates, and will update Windows 10 22H2 systems to build 19045.6396.
KB5066198 preview update (BleepingComputer)
This optional update also includes the following fixes and quality improvements that shipped with the KB5065429 cumulative update during this month's Patch Tuesday:
[File Server] New! As part of the Windows updates released since September 9, this update enables support for IT administrators to deploy hardening measures for SMB.
As part of the Windows updates released since September 9, this update enables support for IT administrators to deploy hardening measures for SMB. [App compatibility (known issue)] Fixed: Addresses an issue that caused non-admin users to receive unexpected User Account Control (UAC) prompts when MSI installers perform configuration or repair operations during the initial installation of an application.
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