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.’

After installing this update, Windows 10 will be updated to build 19045.7807, and Windows 10 Enterprise LTSC 2021 will be updated to build 19044.7807.