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

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