Windows 10 KB5066198 OS Build 19045.6396 (preview) Update is available for download. This optional, non-security update was released on September 25, 2025 includes fixes for the Extended Security Updates (ESU) enrollment wizard, where some users were experiencing issues clicking the “Enroll now” button. This update also addresses two significant issues: a regression that prevented connections to SMBv1 shares over the NetBIOS over TCP/IP (NetBT) protocol, and a problem where the Windows Autopilot Enrollment Status Page (ESP) failed to load during the Out-of-Box Experience (OOBE).
It also includes a servicing stack update (KB5066411) to improve the reliability of the update process by combining the latest servicing stack update (SSU) with the latest cumulative update (LCU).
Also, Microsoft reminded that after October 14, 2025, it will no longer provide free software updates from Windows Update, technical assistance, or security fixes for Windows 10. Invites compatible devices to upgrade to Windows 11 for the latest features, bug fixes, and improvements. The patch is rolling out via Windows update as an optional update and you have to start the installation manually. Additionally, the Windows 10 KB5066198 download links are available on the Microsoft Update Catalog here.
Windows 10 KB5066198 Download
Today’s update is optional, meaning that if you check for updates in Windows Update, you’ll be given the option to download and install it. If you don’t take it, it won’t automatically install. Instead, the fixes will be bundled into next month’s Patch Tuesday update, which will install automatically.
If you want to download and install Windows 10 KB5066198 OS Build 19045.6396.
- Press the Windows key + X and select Settings.
- Go to Windows Update and Security, then Windows Update
- Now hit the Check for Updates button. If you see optional quality updates available, click on Download and Install.
- Once it is complete, you need to restart your PC to apply the changes.
Download the Windows 10 KB5066198 offline installer link here.
Note-
- The above link opens the Microsoft Update Catalog, a library of Windows Update offline installers.
- To get started, click on the ‘Download’ button next to the OS version installed on your machine and run the .msu files to begin the update’s installation.
If you are looking for the Latest Windows 11 ISO image, click here.
Furthermore, after installing this update, compatible devices may receive a message prompting to upgrade to the latest Windows 11.
You can read the complete change log on the Microsoft support site here.
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