KB4023057 - Update for Windows Update Service components
This update includes reliability improvements to Windows Update Service components in all editions of Windows 10, version 1507, 1511, 1607, 1703, 1709, 1803, 1809, 1903, 1909, 2004, 20H2, 21H1, 21H2, and Windows 11 (original release). It may take steps to free up disk space on your device if you do not have enough disk space to install Windows updates.
This update includes files and resources that address issues that affect the update processes in Windows 10 that may prevent important Windows updates from being installed. These improvements help make sure that updates are installed seamlessly on your device, and they help improve the reliability and security of devices that are running Windows 10.
Important: If your device is out of support, it is no longer receiving security updates from Microsoft and may become more vulnerable to security risks and viruses. For this reason, we strongly recommend that you update to the latest version of Windows 10. Each version of Windows 10 is supported for 18 months. After support ends, you must update to a newer version of Windows 10 to continue receiving Windows updates and security fixes. To learn more about the Windows lifecycle, see Windows lifecycle fact sheet and the Windows 11 lifecycle fact sheet.
Important information about devices that have low disk space
- For more update information for Windows 10, version 1809, 1903, and 1909, see KB 5001716.
- This update may request your device to stay awake longer to enable installation of updates.
Note The installation will respect any user-configured sleep configurations and also your "active hours" when you use your device the most.
- This update may try to reset network settings if problems are detected, and it will clean up registry keys that may be preventing updates from being installed successfully.
- This update may repair disabled or corrupted Windows operating system components that determine the applicability of updates to your version of Windows 10.
- This update may compress files in your user profile directory to help free up enough disk space to install important updates.
- This update may reset the Windows Update database to repair the problems that could prevent updates from installing successfully. Therefore, you may see that your Windows Update history was cleared.
When a Windows feature update is available for your device, you may see a message on the Windows Update settings page or elsewhere that asks you to free up disk space by removing files or applications that you do not use regularly. If you see this message, select Fix issues to free up disk space on your device.
After the Windows update has installed, some users may be prompted to restart their device. See Free up drive space in Windows for more information about other ways that you can free up disk space on your device.
To help free up disk space, this update may compress files in your user profile directory so that Windows Update can install important updates. When files or folders are compressed, they appear as having two blue arrows overlaid on the icon. Depending on your File Explorer settings, you may see icons that look larger or smaller. The following screen shot shows an example of these icons.
After you install the update, your files are restored to their original state, and the blue arrows disappear from the file icons in File Explorer. At any point during the update process, you should be able to access your files.
Microsoft Support notification
This update may display a notification on devices that are running low on space. If selected, this notification will open a Microsoft Support URL in the default browser with contact options for Microsoft support so you can easily get help freeing up space on your device.
When this update is installed, new options for cleaning up disk space will be available to make it easier for you to update your device when it is low on disk space. If a feature update fails due to a low disk space, you can help increase storage space by using the Disk Cleanup tool or selecting Free up space now in Settings > Storage. These will help you remove unused files and free up storage space before a major feature update.
How to get this update
Release Channel Available Next Step Windows Update and Microsoft Update Yes None. This update will be downloaded and installed automatically from Windows Update.
It is also offered directly to Windows Update Client for some devices that have not installed the most recent updates.
Microsoft Update Catalog Yes To get the standalone package for this update, go to the Microsoft Update Catalog website.
Important This update that is available from the Microsoft Update Catalog applies only to the versions of Windows 10, versions 1507, 1511, 1607, 1703, 1709, and 1803.
Windows Server Update Services (WSUS) No See the other options.
Note This update is currently not needed on devices that are administered through Windows Server Update Services.
Note: Only builds of Windows 10, versions 1507, 1511, 1607, 1703, 1709, 1803, 1809, 1903, 1909, 2004, 20H2, 21H1, 21H2, and Windows 11 (original release) require this update.
Source: KB4023057: Update for Windows Update Service components