Although the best way to download and install the latest release of Windows 10 is to use the Windows Update option, sometimes you may see an error message that won't let you install the new version.
There are a number of errors that may appear, and they'll be different depending on the problem that caused them. However, if you're having trouble, the quickest way to troubleshoot and resolve this issue is to use the Windows Update troubleshooter tool.
Click the Run the troubleshooter button.
Click the Apply this fix option (if applicable).
Continue with the on-screen directions.
After completing the steps, go to Settings > Update & Security > Windows Update, click the Check for updates button to try the upgrade one more time.
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