This article describes an issue in which Windows Management Instrumentation (WMI) service crashes in Windows 8.1, Windows RT 8.1, Windows Server 2012 R2, or Windows Server 2012. An update is available to fix this issue. Before you install this update, see the Prerequisites section. Symptoms.

Summary. The versions of Windows that are listed at the beginning of this article include a command-line utility (Wmic.exe) to access Windows Management Instrumentation (WMI).

Wmiacpi.sys. 6.1.7600.16385. 31,744. 13-Jul-2009. 23:29. Status. Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. More Information. For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:

You enable Driver Verifier on a computer that is running Windows Server 2008 R2 and that meets the following conditions: The computer has four or more processor sockets. For example, the computer has four Westmere-EX processors. The x2APIC mode is enabled in the BIOS. You try to start the computer.

Swipe in from the right edge of the screen, and then tap Search.Or, if you are using a mouse, point to the lower-right corner of the screen, and then click Search.Type Command Prompt in the Search box, right-click Command Prompt, and then click Run as administrator.If you are prompted for an administrator password or for a confirmation, type the password, or click Allow.

Blue Screen errors (also sometimes called black screen errors or STOP code errors) can occur if a serious problem causes Windows to shut down or restart unexpectedly. You might see a message that says, "Windows has been shut down to prevent damage to your computer" or a similar message.

For example, you press the hotkey to control the brightness of your computer screen. However, the level of brightness does not change. Windows 7 stops responding when you shut down the computer or put the computer into Sleep. This problem frequently occurs on computers that have multiple processors or that have a processor with multiple cores.

Cause. This issue occurs because the WMI service incorrectly processes a deletion operation inside the WMI repository. Note Not all WMI repository corruptions are caused by this issue. Resolution. Hotfix information. A supported hotfix is available from Microsoft.

This update makes improvements to the Windows recovery features for Windows 11, version 21H2. Note This compatibility update is included in KB5034440: Windows Recovery Environment update for Windows 11, version 21H2: January 9, 2024. How to get this update. Install this update. Prerequisites. There are no prerequisites to apply this update.

Summary. An information disclosure vulnerability exists in the Windows kernel that could allow an attacker to retrieve information that could lead to a Kernel Address Space Layout Randomization (ASLR) bypass. To learn more about the vulnerabilities, go to the Security Update Guide.