A known issue has been added to the Windows 11 preview update "KB5079391," released on March 26, 2026, which causes errors during installation. Currently, Microsoft has temporarily suspended the distribution of this update to address this issue. Preview updates are not mandatory like security updates, so there is no need to install them if you don't want to. This article will explain the symptoms of the error and the current situation in detail.
Installation issues occurring with KB5079391
Microsoft has announced new known issues regarding the Windows 11 preview update "KB5079391" (OS builds 26200.8116 and 26100.8116), which was released on March 26, 2026.
Details and symptoms of error "0x80073712"
When attempting to install this update, some devices are experiencing an error code "0x80073712" and the installation is failing.
Specifically, the following message will appear on the Windows Update screen:
"Some update files are missing or there is a problem with the update files. The update program will be updated later."
The download will be retried. Error code: (0x80073712)
Microsoft's response and current distribution status
In response to this issue, Microsoft has temporarily suspended the deployment of KB5079391 to prevent further impact.
An investigation into the cause is currently underway, and this update may not be available when you open Windows Update. Microsoft will share any additional information as soon as it becomes available.
User-side measures (not required for the preview version)
The KB5079391 update in question is merely a preview update for next month's monthly update. It is not a mandatory update that includes security fixes, so there is no need to install it immediately.
If it doesn't appear in Windows Update, just wait. If it does appear but you get an error, don't try to fix it yourself; it's best to wait for the distribution to resume or for the official monthly update next month.
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