Summary. This security update makes improvements to Secure Boot DBX for the supported Windows versions listed in the "Applies to" section. Key changes include the following:

Smart App Control is a feature of Windows 11 that helps to block malicious, untrusted, or potentially unwanted apps from running on your device.

Learn how to troubleshoot and fix problems with nearby sharing in Windows.

Find out how to submit a request for a refund for a purchase of digital Xbox content.

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 receive and interpret activity reports of your child's device use, including web browsing, apps and games usage, and screen time.

How to use Stream's Transcripts and Captions features with video in OneDrive and SharePoint.

Set up the Microsoft Authenticator app from the Security info page. Depending on your organization’s settings, you might be able to use an authentication app as one of your security info methods.

Training: Learn how to create a spreadsheet, enter data, and create a chart in Excel.

Get help with Outlook for Windows, the Outlook app, Outlook.com, and more. Find training videos, how-to articles, and Outlook support content