Microsoft has confirmed reports that the November 2026 security updates are not installing on Windows 11 systems with the October Preview Update. This follows widespread reports that the KB5132061 update is not installing, with affected users seeing the installation process hang mid-stream and then trigger errors 0x800f0989 or 0x800f0993. “When attempting to install the November 2026 Windows Security Update (the source KBs listed above), some devices may not be able to complete the installation. Affected devices may repeatedly attempt to install the update or display error code 0x80070306, 0x800f0989, or 0x800f0993,” Microsoft said in a service update seen by BleepingComputer. “This issue affects a limited number of devices that installed the October 2026 non-security preview update (KB5127936). Devices that did not install the October 2026 non-security preview update are not affected.” Microsoft also told IT administrators that installation issues will be automatically resolved for all affected customers on Friday morning and that end users do not need to take any action to receive the fix. “All affected devices should be patched within 24 to 48 hours starting November 11, 2026 at 10 a.m. Pacific Time. Once your device receives the patch, it will automatically download and install the November 2026 security update through Windows Update,” it added. The company also urged administrators who are still receiving reports of installation problems after 48 hours to contact Microsoft support. This isn’t the first time Microsoft has had to address Windows update installation issues since the beginning of the year. In March, you had to perform a non-security preview update for Windows 11 (KB5079391) due to 0x80073712 errors during installation. In May, it also fixed installation failures and 0x800f0922 errors by deploying the Windows 11 May 2026 security update (KB5089549). More recently, in June, Microsoft warned users that they may encounter problems installing the latest monthly updates and see errors 0x80073712 or 0x800f0993 on some Windows devices updated to Windows 11 24H2 or 25H2. Adaptive Security’s AI agents analyze email intent, context, and behavior to uncover phishing, business email compromise, and invoice fraud. See what happens with a 14-day read-only scan of Microsoft 365 or Google Workspace, without MX changes. Start your free email security scan.
