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.

An attacker who successfully exploited the vulnerability might bypass secure boot and load untrusted software. This security update addresses the vulnerability by adding the signatures of the known vulnerable UEFI modules to the DBX. To learn more about this security vulnerability, see the following advisory:

If some Windows functions aren't working or Windows crashes, use the System File Checker to scan Windows and restore your files. Though the steps below might look complicated at first glance, just follow them in order, step-by-step, and we’ll try to get you back on track. Run the System File Checker tool (SFC.exe)

PC Health Check app brings you up to date info on your Windows device health, helping you take action to improve your device performance and troubleshoot performance problems. It is periodically updated based on customer feedback to help you make the most of your Windows PC. How to open PC Health Check. In Windows, use Search on the taskbar to ...

This article introduces a hotfix that adds performance data to the Active Directory event log on a Windows Server 2012, Windows Server 2008 SP2 or Windows Server 2008 R2 Service Pack 1 (SP1)-based domain controller. After you install this hotfix, the domain controller enables additional filters to log the following performance data:

The enablement package is a great option for installing a scoped feature update like Windows 11, version 23H2 as it enables an update from version 22H2 to version 23H2 with a single restart, reducing update downtime. This enables devices to take advantage of new features now.

Fixes an issue in which an event ID 4227 is logged when a client application tries to connect to a Windows Server 2008 SP2-based server during a dynamic port allocation process.

This update prevents you from receiving error messages that are related to the application manifest expiry feature of the AD RMS clients. This fix is also necessary for Windows Rights Management clients. This update ensures continued compatibility between RMS-enabled applications and the RMS client. As a follow up to the Office 2003 Information ...

A single action, such as moving from one control on an object to another control, can trigger several different events, which occur in a particular sequence. Knowing when events occur and in what order they occur is important, because it can affect how and when your macros or event procedures run.

For issues that are not covered on this page, we have multiple tools to help you automatically diagnose and fix a range of classic Outlook problems. Check out this article: Resolve Outlook for Windows issues with automated troubleshooting tools. Outlook Known issues in October 2024 updates.