Microsoft says Windows September updates break SMBv1 shares

Microsoft has confirmed that the 2025 Windows security updates are causing connection issues to Server Message Block (SMB) v1 ...

Windows 10 gets its final update before support ends. What’s in it?

Update KB5066198 will be the last non-security update for Windows 10. It's now available as an optional install.
Windows Report

Windows 11 KB5068221 fixes issues with Office apps running on App-V

Microsoft issues Windows 11 KB5068221 to fix Office App-V crashes, but SMBv1 connectivity problems remain unresolved.
Windows Report

Windows 11 KB5065790 Preview fixes SMBv1 file sharing issue and Windows sign-in freezes

Microsoft’s latest Windows 11 update KB5065790 fixes SMBv1 file sharing problems and a sign-in freeze caused by SIM PIN.