Support for Windows 10 is officially coming to an end next month with one final update on October 14th, 2025. Yesterday, Microsoft released a preview version of that cumulative update, which is optional to install but available if you want to get ahead of the curve.

Known as update KB5066198, it brings Windows 10 up to Build 19045.6396. This update doesn’t actually contain any new features for Windows 10, which would be more than surprising at this point. Instead, it fixes two bugs that Microsoft was keen to address.

From the update’s support document:

[SMBv1 protocol connectivity (known issue)] Fixed: An issue where you might not be able to connect to shared files and folders if you’re using the Server Message Block (SMB) v1 protocol on NetBIOS over TCP/IP NetBIOS (NetBT). This can happen after installing update KB5065429.

[Autopilot Enrollment Status Page (ESP) (known issue)] Fixed: An issue when using Windows Autopilot to deploy Windows 10, version 22H2 to devices with the Enrollment Status Page (ESP) configured might find that the ESP doesn’t load during the Out-of-Box Experience (OOBE).

These are issues that are likely to affect a small number of users. You can obtain update KB5066198 right now via Windows Update or manually from the Microsoft Update Catalog.

Windows 10 end of support in sight

As mentioned above, this appears to be the final update for Windows 10 that provides any actual changes or bug fixes. After this one, all future updates will be security-related and only available to users who have extended their Windows 10 support via the ESU program. (The ESU program is opt-in only. If you don’t, you’ll stop receiving updates on your Windows 10 PC, which opens you up to risks.)

Further reading: This free tool puts you on Windows 10 with extended support until 2032

Author: Laura Pippig, Staff Writer, PC-WELT