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When you query the LastLogonUserName property on a Windows XP based-computer, the property is empty.
Note The LastLogonUserName property is stored in the Win32_ComputerSystem Windows Management Instrumentation (WMI) class.
This problem occurs because a program cannot query the Win32_ComputerSystem WMI class when the following conditions are true:
The account that queries the user name is running under any one of the following accounts:
The Terminal Services service is disabled.
Note Any program that queries for the user name may experience this problem. For example, scripts or a management tool such as Microsoft Systems Management Server may experience this problem.
To resolve this problem apply this hotfix to the Windows XP based-computers that are returning an empty LastLogonUserName property. A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.
If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.
Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:
Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.
No prerequisites are required.
You do not have to restart the computer after you apply this hotfix.
Hotfix replacement information
This hotfix does not replace any other hotfixes.
The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.
Windows XP with Service Pack 1
Windows XP with Service Pack 2
Microsoft has confirmed that this is a bug in the Microsoft products that are listed in the "Applies to" section.
For more information about the terminology that is used in this article, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates