What should you do if you receive an error message stating that the update fails while trying to apply Windows Updates to a Windows client computer?

Run the Windows Update Troubleshooter in the Settings app on Windows 10 and Windows 11 if the update doesn't work properly. The troubleshooter will look for and make an effort to fix any issues that might hinder operating system updates. Once it's finished, look for updates once more. The troubleshooter might need to be run more than once. The operating system needs to be updated often because patches for security holes in the system may be included in updates. Because you would later need to install the same update, you wouldn't want to reinstall the system. You probably wouldn't need to buy a new computer.