See some of the most common upgrade and installation errors for Windows 10 and Windows 11, and what you can do to try to fix them.

This page features a list of common error codes and solutions. Learn how to find your error code quickly.

Need to know about required disk space, error codes, removing an installed update, or other update questions? Find more help at Windows Update: FAQ. If you’re an IT professional, you can defer updates. Go to Windows 10 servicing options.

Learn what to do if you receive an error message and code while trying to take a system update on your Xbox One console.

Error messages indicating that the system firmware returned an error while attempting to update a Secure Boot variable. The KEK update remains in progress or does not complete.

This update introduces a servicing stack update (SSU) which incorporates an updated certificate chain to improve Azure environment validation. For more information, see the servicing stack update section.

This guide provides detailed steps to troubleshoot and resolve Windows Update problems effectively. If you are using a Windows 10 device, start by running the automated Windows Update troubleshooter in the Get Help app.

Topics include Secure Boot certificate update failures, incorrect Secure Boot states, unexpected BitLocker recovery prompts, and boot failures following Secure Boot configuration changes.

Windows 10 support ends on October 14, 2025. Upgrade to Windows 11 now to ensure continued security and feature updates. Learn more about the transition.

Learn more about updates for Windows 10 version 1903, including improvement and fixes, any known issues, and how to get the update.