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Microsoft has officially confirmed that some users are facing installation problems with the November 2026 security update for its Windows 11 operating system. On affected computers, the update process stalls midway, displaying error codes such as 0x800f0989, 0x800f0993, and 0x80070306. According to the company, the issue impacts a limited number of Windows 11 devices. Specifically, the error occurs on systems that previously installed the October 2026 non-security preview update, KB5127936. Devices without this earlier preview update are not affected by the installation failure.
Update Installations Stall Midway
During attempts to install the November 2026 security update, several users reported that the download and installation process failed to complete normally. In several cases, the installation progresses up to a certain stage before stopping abruptly. Following the failure, affected systems repeatedly attempt to reinstall the package without success.
The issue has primarily been reported by users trying to install update KB5132061. Once the installation fails, the operating system displays error codes 0x800f0989, 0x800f0993, or 0x80070306 on the screen. Repeated installation failures have prompted uncertainty among users regarding whether they should manually download the update again or adjust their Windows settings to resolve the disruption.
Microsoft Issues Official Clarification
In its official service update notice, Microsoft acknowledged that certain devices are unable to complete the installation of the November 2026 Windows security update. The company noted that affected computers might either retry the installation repeatedly or display error messages on the screen.
Microsoft clarified that the root cause is linked to the October 2026 non-security preview update, KB5127936. Systems carrying this specific preview update are vulnerable to installation errors when applying the November security patch. Conversely, computers that did not receive the October preview update are not expected to experience the issue. This indicates that the problem is restricted to systems with a particular update configuration rather than affecting the entire Windows 11 user base.
Automatic Repair Expected Within 48 Hours
To resolve the disruption, Microsoft has initiated an automated repair process for affected users and IT administrators. Starting at 10:00 AM Pacific Time on November 11, 2026, the automated fix is scheduled to resolve the issue on impacted devices within 24 to 48 hours. Once the repair is applied, affected computers will automatically re-download and install the November 2026 security update without user intervention.
Microsoft has advised users not to download manual fixes, alter system registry entries, or modify Windows system files. However, IT administrators have been instructed to contact Microsoft Support if the update installation failure persists across their networks after the 48-hour window passes.
Installation glitches have affected multiple Windows updates throughout 2026. In March 2026, Microsoft withdrew the Windows 11 non-security preview update KB5079391 after users encountered error code 0x80073712 during installation. Later, in May 2026, the Windows 11 security update KB5089549 triggered error code 0x800f0922, requiring a subsequent patch from the company. In June 2026, Microsoft also warned that certain devices upgraded to Windows 11 versions 24H2 and 25H2 could face monthly update installation failures involving error codes 0x80073712 and 0x800f0993.
For now, affected Windows 11 users are advised to avoid making repeated manual changes to their update settings. Once the automated repair process concludes, Windows Update should install the November security patch automatically. Ensuring the update installs properly remains essential, as it delivers important security fixes for November 2026.
