The user encounters the issue when he tries to update his system to the KB4592438 update but the update fails to install (for some of the users, the failure occurred when update install was at 100%). Before moving on with the solutions to fix the failed Windows update, make sure all the pending updates are installed (even optional updates) and then retry to update your system.
Solution 1: Start/Restart the WMI and IP Helper Services
The WMI and IP Helper services are essential for the completion of the update process. You may encounter the error at hand if the said services are disabled or in an error state. In this case, enabling or restarting these services may solve the problem.
Solution 2: Use the Offline Installer of the KB4592438 Update
If the issue is a result of a communication glitch between your system and the update servers, then using the offline installer of the KB4592438 update may solve the update issue.
Solution 3: Use the Command Prompt
Windows update is a complex process and depends on several different aspects of your system. The update process may fail if any of its dependencies are corrupt or in an error state. In this case, we can use different cmdlets to streamline these dependencies and thus solve the problem.
Solution 4: Clear the Temp Files and Free Up Disk Space
The update may fail to install if there is not enough disk space available for it to install. In this case, clearing the temp files and freeing up disk space may solve the problem. Keep in mind that if you have directed the Temp folder to another disk (other than the system drive) by using the environment variables, then make sure that disk has enough space available to complete the update process or otherwise direct the Temp folder to the system drive (which has enough free space available).
Solution 5: Perform an In-Place Upgrade
If none of the solutions solved the issue, then you can try to perform an in-place upgrade of the system to sort out the issue. But keep in mind that whenever in the upgrade process you are asked, make sure to select the option of Keep Files and Applications. For some of the users, the 20H2 Enablement package may remove the said option, so, removing the 20H2 Enablement Package and then performing the in-place upgrade may solve the problem. If that did not solve the issue, then create a bootable USB with the downloaded ISO file and then try to upgrade your system through that USB. If the in-place upgrade fails, then either perform a clean install of Windows or disable the update in the system’s settings (not recommended). If the clean install does not solve the issue, then try to install Windows on another hard-drive as the issue could be due to the hardware compatibility.
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