Angolo di Windows The November 2026 security update may not finish installing on some Windows PCs 11. Affected devices may retry or display the errors 0x80070306, 0x800f0989, or 0x800f0993.
According to Microsoft’s notice, the issue affects a limited number of devices that had installed the October non-security preview update KB5127936. An automatic repair through Windows Updateis already being rolled out, with no manual action needed to receive it.
Which update is affected
The update that may fail is KB5132061, released on 10 November 2026. It should not be confused with KB5127936, the earlier October preview identified in the notice as a condition for the issue to occur.
| Version listed in the notice | Update that may fail | Microsoft ID |
|---|---|---|
| Windows 11 26H2 | KB5132061 | WI1549693 |
| Windows 11 25H2 | KB5132061 | WI1549694 |
| Windows 11 24H2 | KB5132061 | WI1549695 |
The table reflects the notice provided. The November KB applies to all editions of Windows 11 26H2 and 25H2 and to the Enterprise and Education editions of Windows 11 24H2.
Not all PCs receiving the update are affected. According to the communication, devices that had not installed the earlier preview are not affected by this specific flaw.
One limitation of the documentation should be noted: the notice also lists 24H2, whereas the public page for preview KB5127936 lists only 25H2 and 26H2. It is therefore not appropriate to infer from this information an installation path for the preview on 24H2 or to invent a technical explanation for this difference.
What errors may appear
The reported codes are:
- 0x80070306
- 0x800f0989
- 0x800f0993
Alternatively, Windows Update may offer the installation again without being able to complete it.
Seeing one of these codes alone does not, however, prove that the PC falls into the case described: the update being installed and the previous update history should also be taken into account. It is not sufficient reason to conclude that the entire operating system is damaged.
How the automatic repair works
The notice specifies that the repair is carried out automatically on affected devices that are connected to the Internet and use Windows Update in Settings to install updates.
There is no need to download a dedicated tool or run commands to receive it. Once the repair has been applied, the device should automatically download and install the November security update.
The status listed is Mitigated, meaning mitigated. The notice does not list a separate fix KB and says the documentation will be updated once the rollout is complete. It should therefore not be interpreted as confirmation that all devices have already been repaired.
When it should arrive: times in Italy
Microsoft specifies a 24–48 -hour window from 11 November 2026 to 10:00 Pacific time.
In Italy, the conversion is:
| Stage | Date and time in Italy |
|---|---|
| Start of the stated window | 11 November 2026, at 19:00 |
| After 24 hours | 12 November 2026, at 19:00 |
| After 48 hours | 13 November 2026, at 19:00 |
The window begins at the time communicated by Microsoft, not when an individual user reads the notice. The device must still be able to receive the repair: a PC that has remained offline should not automatically be considered fixed once the end time is reached.
What to do on your PC
If the behavior matches the description:
- Keep the device connected to the Internet and available to receive updates.
- Open Settings > Windows Update.
- You can select Check for updates to check for available updates.
- After the repair, allow the download and installation of KB5132061.
- If Windows asks you to restart to complete the update, do so after saving your work.
Manually checking for updates is optional: it is not specified as a requirement for receiving the repair and does not guarantee that it will arrive immediately.
To check which updates are installed, go to Settings > Windows Update > Update history. It is useful to distinguish an earlier failed attempt from an installation that was subsequently completed.
Are Windows Update resets or reinstallations needed?
The procedure communicated for this issue is automatic. The notice does not require resetting Windows Update components, changing the Registry, uninstalling the preview, or reinstalling Windows.
It is therefore best to wait for the announced window and check whether the device receives the repair before applying general procedures. An error that persists may require further checks, but by itself it does not prove that a reinstallation is necessary.
For business PCs managed through other channels, do not assume that the mechanism applies in the same way: the notice explicitly describes devices that use Windows Update in Settings. In these environments, IT should verify the situation.
If installation continues to fail
If the problem persists after the 48 -hour window, Microsoft recommends using Windows Support or contacting support.
Have the error code, Windows version, update history, and time of the last attempt ready. This information helps determine whether the PC is still affected by the reported flaw or has a different problem.
Reference date: article verified on 12 November 2026. The sources consulted describe the repair rollout as ongoing; they do not confirm that it has been completed on all devices.
