Microsoft has confirmed reports that the November 2026 security updates are failing to install on Windows 11 systems with the October Preview Update.
This follows numerous reports that the KB5132061 update is failing to install, with affected users seeing the installation process lock up midway and then trigger 0x800f0989 or 0x800f0993 errors.
“When you attempt to install the Windows November 2026 Security Update (the original KBs listed above), some devices may be unable 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 have installed the October 2026 Non-Security Preview Update (KB5127936). Devices that have not installed the October 2026 Non-Security Preview Update are not affected.”
Microsoft also told IT administrators that installation issues will be resolved automatically for all affected customers by Friday morning and that end users will not need to take any action to receive the patch.
“All affected devices should be repaired within 24-48 hours starting November 11, 2026 at 10:00 a.m. PT. Once your device receives the repair, it will automatically download and install the November 2026 security update via Windows Update,” it adds.
The company also urged administrators still receiving reports of installation issues after 48 hours to contact Microsoft Support.
This isn’t the first time Microsoft has had to resolve issues installing Windows updates since the start of the year. In March, it had to release a buggy non-security Windows 11 preview update (KB5079391) due to 0x80073712 errors during installation.
In May, it also fixed installation failures and 0x800f0922 errors during the deployment of Windows 11 May 2026 Security Update (KB5089549).
Most recently, in June, Microsoft warned users that they might encounter issues installing the latest monthly updates and see errors 0x80073712 or 0x800f0993 on some Windows devices upgraded to Windows 11 24H2 or 25H2.
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