Microsoft confirms Windows 11 November update fails to install

BleepingComputer reported that Microsoft confirmed the November 2026 Windows security update KB5132061 fails to install on a limited number of Windows 11 devices that took the October 2026 non-security preview update. Microsoft said in a service update that affected machines may repeatedly attempt installation or show error codes 0x80070306, 0x800f0989, or 0x800f0993. "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 said. The company added that affected devices should be repaired within 24 to 48 hours from 18:00 UTC on November 11, with no end-user action required, and administrators should contact Microsoft Support if problems continue after 48 hours. Microsoft also said that once a device receives the repair, it will automatically download and install the November security update via Windows Update.

The Register reported on November 11 that users began seeing 0x800F0993 and 0x800F0989 errors in the hours after the patch was released, while Microsoft had not listed any known issues or made a statement. One user on ElevenForum suggested the bug might be tied to Windows Sandbox and said disabling the feature and rebooting allowed the patch to install, but others reported problems regardless of Sandbox status. Alternative fixes included using DISM to check the package or downloading the update manually. The Register updated its report on November 12 to say Microsoft confirmed a problem and a fix was rolling out, requiring no action for customers connected to the internet and using Windows Update. The publication added that there appear to be "a few issues with the update around printing and activation".

Windows Central reported that Microsoft ended support for Windows 11 version 23H2 Enterprise and Education with this month's security release, making KB5131087 the final security update for those editions, and Microsoft said devices running those editions will no longer receive monthly security updates and should move to a supported version such as Windows 11 24H2, 25H2, or 26H1.

The Register noted that the update addresses 726 vulnerabilities in Windows alone, which makes the installation failures disruptive for administrators who need the fixes. Five Nines reported in October that Microsoft's October Patch Tuesday fixed more than 1,400 CVEs, a record. BleepingComputer also noted that Microsoft has dealt with Windows update installation problems several times this year, including a pulled preview update in March, a fixed 0x800f0922 failure in May, and a June warning about 0x80073712 or 0x800f0993 errors on upgraded PCs.