Microsoft releases Windows 10 KB5126657 extended security update
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Microsoft released the Windows 10 KB5126657 extended security update, which includes this month's record-breaking October 2026 Patch Tuesday fixes and a few bug fixes and changes.
If you are running Windows 10 Enterprise LTSC or are enrolled in the ESU program , you can install this update like normal by going into Settings, clicking on Windows Update, and manually performing a 'Check for Updates.'
