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Microsoft confirms Windows security updates installation issues
BleepingComputer • • general
Key Points:
- Microsoft confirmed that the November 2026 security updates fail to install on Windows 11 systems with the October 2026 preview update (KB5127936), causing errors like 0x800f0989, 0x800f0993, and 0x80070306.
- The issue affects only devices that installed the October 2026 non-security preview update; systems without this update are not impacted.
- Microsoft stated the problem will be automatically resolved within 24 to 48 hours starting November 11, 2026, and users do not need to take any action to receive the fix.
- Administrators experiencing ongoing installation issues after 48 hours are advised to contact Microsoft Support for assistance.
- This incident follows previous Windows 11 update installation problems earlier in 2026, including issues in March and May related to other preview and security updates.
