Microsoft has confirmed a problem with its November 2026 Windows 11 security update. On some PCs, Windows Update keeps trying to install it and fails with error 0x80070306, 0x800f0989 or 0x800f0993.
The fault is listed in Microsoft's release notes for KB5132061, dated 10 November 2026. Microsoft added the known issue on 11 November.
What Microsoft says will happen
Microsoft is sending an automatic repair to affected PCs. It applies to devices that are connected to the internet and use Windows Update in Settings. You do not need to download a separate repair or change the registry.
The rollout started at 10am PT on 11 November 2026. Microsoft says all affected devices should receive it within 24 to 48 hours. Once the repair arrives, Windows should download and install the security update automatically.
That makes waiting the sensible first step if the error has only just appeared. Keep the PC connected to the internet, leave it powered on for a while, then check Windows Update again later.
What to do now
- Open Start > Settings > Windows Update.
- Note the error code before closing the window. A photo is fine.
- Make sure important documents are backed up before doing more update work.
- Leave the PC online so Microsoft's repair can reach it.
- After the rollout window, select Check for updates. Install what Windows offers and restart if asked.
Do not reset Windows just because this update has failed once or twice. Avoid random registry changes, unofficial update tools and third-party "fix" downloads too. Microsoft says the repair is automatic, so those steps add risk without helping it arrive faster.
When it may be a different problem
The three error codes above are the ones Microsoft has named for this incident. A different code, very low free space, a damaged Windows installation or a PC that repeatedly rolls back after restarting may have another cause.
If the same error remains after Microsoft's 48-hour window, start with Microsoft's Windows Update instructions. At that point it is reasonable to check storage space, Windows system files, update services and the update history rather than repeatedly pressing Retry.
When repair help makes sense
Ask for help if Windows Update is still stuck after the repair window, the PC is caught in a restart loop, or you cannot confirm that your files are backed up. Remote support may be enough for a Windows Update fault on a working PC. A machine that will not start, has storage errors or holds unbacked-up files is safer to inspect in person before attempting bigger repairs.
Microsoft's KB5132061 release notes remain the best place to check whether the automatic repair rollout has finished or the advice has changed.