Open Software Solutions

On a Windows Vista-based computer, you click the Resource Monitor button. Then, the Performance Monitor (Perfmon.exe) process may continuously start and stop. Additionally, Windows Vista may stop responding.

Note You click the Resource Monitor button to display the utilization details for the CPU, for memory, for the disk, and for the network.

Steps to reproduce the problem

•	You log on to a Windows Vista-based computer by using an account that has administrator credentials.
•	You disable the User Account Control (UAC) feature.
•	You log on to the Windows Vista-based computer on which UAC has been disabled. Additionally, you use an account that does not have administrator credentials.
•	On the Performance tab of the Windows Task Manager dialog box, you click the Resource Monitor button.

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This problem occurs because Perfmon.exe uses the ShellExecuteEx function. However, the ShellExecuteEx function cannot use the Runas command correctly if the UAC feature is disabled.

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Hotfix information

A supported hotfix is now 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 service pack that contains this hotfix.

To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:

Note If additional issues occur or 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. To create a separate service request, visit the following Microsoft Web site:

Prerequisites

No prerequisites are required.

Restart requirement

You do not have to restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other previously released hotfixes.

Registry information

To use one of the hotfixes in this package, you do not have to make any changes to the registry.

File information

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 Vista, 32-bit versions

File name	File version	File size	Date	Time	Platform
Pdhui.dll	6.0.6000.20594	46,080	09-May-2007	08:51	x86
Perfmon.exe	6.0.6000.20594	120,320	09-May-2007	07:24	x86
Sysmon.ocx	6.0.6000.20594	389,632	09-May-2007	08:51	x86
Wdc.dll	6.0.6000.20594	1,019,904	09-May-2007	08:52	x86
Wvc.dll	6.0.6000.20594	456,704	09-May-2007	08:52	x86

Windows Vista, 64-bit versions

File name	File version	File size	Date	Time	Platform
Pdhui.dll	6.0.6000.20594	58,880	09-May-2007	09:49	x64
Perfmon.exe	6.0.6000.20594	124,928	09-May-2007	07:44	x64
Sysmon.ocx	6.0.6000.20594	475,648	09-May-2007	09:50	x64
Wdc.dll	6.0.6000.20594	1,243,648	09-May-2007	09:50	x64
Wvc.dll	6.0.6000.20594	614,400	09-May-2007	09:50	x64

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Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the Applies to section.

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For more information, click the following article number to view the article in the Microsoft Knowledge Base:

Command-line parameters

For more Information about the command-line parameters for Windows Reliability and Performance Monitor, visit the following Microsoft Web site:

The /noelev parameter

The /noelev parameter is a new parameter for Windows Reliability and Performance Monitor. You can run the perfmon /noelev command to display the utilization details for the CPU, for memory, for the disk, and for the network. However, this parameter does not add any new functionality.

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