Microsoft says the25 Windows security updates are causing smart card authentication and certificate issues due to a change designed to strengthen the Windows Cryptographic Services.

Windows 10 KB5066791 is the last update if you don't subscribe to ESU (Extended Security Updates). Download it today.

Microsoft accidentally broke several things in the October 2025 Windows Update, but smart card authentication was not one of ...

Microsoft has detailed a fix for a bug affecting tons of versions of Windows, but applying the patch is not as simple as ...

After installing the update previews from late September or the security updates from October in Windows, some unexpected ...