Overview of the Update Issue

Reports have emerged indicating that the November 2026 security updates for Windows 11 are encountering installation failures on systems that received the October 2026 preview update. The problematic update, identified as KB5132061, has left users facing errors such as 0x800f0989 and 0x800f0993 during installation attempts.

Microsoft has publicly confirmed these issues in a service notice, stating, “When attempting to install the November 2026 Windows security update, some devices might be unable to complete the installation.” Affected users have reported difficulties in completing the installation process, leading to repeated attempts and error messages.

Details on Affected Devices

The problems primarily concern devices that installed the previous non-security preview update from October 2026 (KB5127936). Microsoft has specified that systems which did not undergo this update remain unaffected by the current installation failures.

Proposed Solutions

In response to these issues, Microsoft has assured IT administrators that the installation problems will be resolved automatically within a stipulated timeframe. The company articulated that “all affected devices should be repaired in 24 to 48 hours starting from November 11, 2026, 10am PT.” After receiving the repair, the November security update will be installed automatically via Windows Update.

Administrators experiencing continuing issues after this window are encouraged to reach out to Microsoft Support for further assistance.

History of Update Challenges

This is not the first instance this year where Microsoft has addressed similar installation complications. In March 2026, users encountered difficulties linked to the non-security preview update (KB5079391), while subsequent updates in May and June also led to various errors during installation attempts for Windows updates.