This event is logged when the Secure Boot DBX variable is updated successfully. The DBX variable is used to untrust Secure Boot components and is typically used to block vulnerable or malicious Secure Boot components such as boot managers and certificates used to sign boot managers.

Windows 11, version 22H2; July 25, 2024—KB5040527 (OS Builds 22621.3958 and 22631.3958) Preview; July 9, 2024—KB5040442 (OS Builds 22621.3880 and 22631.3880)

Learn how to identify a phishing scam, designed to steal money via fake emails.

If you need to work in a location without an Internet connection, make sure to download and open the documents you want on your mobile device before you go offline.

Learn which network ports are used when configuring a firewall or router to use with an Xbox console and Xbox Live.

Use the Xbox mobile app, the Xbox Game Pass app, or the Microsoft Store on PC to remotely install games—so your games are ready when you are.

Learn how to check your Xbox purchase history. If you compared your bank statement to your purchase history and others’ purchase histories and still can’t reconcile the charge, note that you can investigate a charge from Microsoft on any card you own.

Learn how to get older apps or programs to run on Windows 10 or Windows 11 by adjusting compatibility settings.

Learn how to view, manage, and delete cookies in Microsoft Edge.

If you get a disc error when playing a CD or DVD in your Xbox console, try these troubleshooting tips.