We guide you through the different methods
How to Fix Windows Update Installation Error 0x80070103 in Windows 11
Windows' "Installation Error – 0x80070103" keeps bugging you until an update is installed. Your updates may not install for a variety of reasons. It's possible that your PC has already installed the update you're trying to install, or that your computer is experiencing another issue. Regardless of what's causing the problem, there are a few troubleshooting tips you can follow to fix it. We'll show you what those solutions are.
Some of the reasons why the update fails to install and the above error message is displayed are that there is a minor issue with Windows Update, Windows Update service is not working properly, there are issues with the update cache, core files of your system are corrupted, and more.
If your update fails to install and you see the error message “Install Error – 0x80070103”, you can quickly fix this by retrying, pausing, and resuming your update. This will pause and then resume the update installation, which may fix your issue.