Diskperf.exe May Hang with 8-Character Entry in the Registry Filter List (278662)

The information in this article applies to:

Microsoft Windows 2000 Server
Microsoft Windows 2000 Advanced Server
Microsoft Windows 2000 Professional

This article was previously published under Q278662

SYMPTOMS

Diskperf.exe may stop responding (hang) if both of the following conditions exist:

There are filter drivers on the disk class registry key (HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E967-E325-11CE-BFC1-08002BE10318}\UpperFilters) that have 8-character names (the same length as the name "diskperf").
One of these names is located before the "diskperf" filter name in the filter list.

CAUSE

This behavior is caused by a problem in Diskperf.exe that causes the program to enter an infinite loop.

RESOLUTION

To resolve this problem, obtain the latest service pack for Windows 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

260910 How to Obtain the Latest Windows 2000 Service Pack

The English version of this fix should have the following file attributes or later:

   Date      Time     Version        Size    File name
   ------------------------------------------------------
   11/10/00  11:39PM  5.0.2195.2715  14,096  Diskperf.exe

STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Windows 2000 Service Pack 2.

MORE INFORMATION

For additional information about how to install Windows 2000 and Windows 2000 hotfixes at the same time, click the article number below to view the article in the Microsoft Knowledge Base:

249149 Installing Microsoft Windows 2000 and Windows 2000 Hotfixes

Modification Type:	Minor	Last Reviewed:	9/26/2005
Keywords:	kbHotfixServer kbQFE kbbug kbfix kbWin2000PreSP2Fix KB278662