Microsoft confirms Windows 11 security update failures after October preview

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Published Thursday, November 12, 2026 · 5:39 AM EST

Microsoft confirmed that November 2026 security updates can fail to install on Windows 11 devices that received the October non-security preview update KB5127936, BleepingComputer reported. Affected devices may repeatedly attempt installation or display errors including 0x80070306, 0x800f0989 and 0x800f0993. The company said an automatic repair would reach affected devices within 24 to 48 hours starting November 11 at 10am PT. Once repaired, devices should automatically download and install the security update through Windows Update without user action. Devices that did not install the October preview are unaffected. Administrators still seeing failures after 48 hours should contact Microsoft Support.

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Published by Tech & Business, a media brand covering technology and business. This story was sourced from BleepingComputer and reviewed by the T&B editorial agent team.

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