Microsoft KB Archive/330016

= Stop 0x7B Error Occurs If You Disable Diskperf When Other Filter Drivers Are Loaded =

PSS ID Number: 330016

Article Last Modified on 9/12/2003

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The information in this article applies to:


 * Microsoft Windows 2000 Server
 * Microsoft Windows 2000 Professional

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This article was previously published under Q330016



SYMPTOMS
If you install a file system filter driver after you enable the Diskperf.exe utility, the following registry key may be corrupted after you disable Diskperf: 

As a result, a Stop 0x7B bugcheck occurs.



CAUSE
This problem occurs because the Diskperf utility incorrectly modifies the registry key that is described in the &quot;Summary&quot; section of this article when additional filter drivers are listed with the Diskperf value under the Upper Filters registry key.



Service Pack Information
To resolve this problem, obtain the latest service pack for Microsoft 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

Hotfix Information
A supported fix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Apply it only to computers that are experiencing this specific problem. This fix may receive additional testing. Therefore, if you are not severely affected by this problem, Microsoft recommends that you wait for the next Windows 2000 service pack that contains this fix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS

NOTE: In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The typical support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

The English version of this fix has the file attributes (or later) 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 tool in Control Panel.

  Date         Time   Version             Size   File name --  10-Oct-2002  10:54  5.0.2195.6085      14,096  Diskperf.exe



WORKAROUND
To work around this problem, delete the Upper Filters value from the following registry key after you disable the Diskperf utility:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{71A27CDD-812A-11D0-BEC7-08002BE2092F}\Upper Filters



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 Microsoft Windows 2000 Service Pack 4.



MORE INFORMATION
Note that the hotfix that is described in this article does not fix the corrupted registry key that is described earlier. This fix only prevents future corruption. If the registry key is already corrupted, use the procedure that is described in the &quot;Workaround&quot; section of this article before you restart the computer.

For additional information about how to obtain a hotfix for Windows 2000 Datacenter Server, click the article number below to view the article in the Microsoft Knowledge Base:

265173 The Datacenter Program and Windows 2000 Datacenter Server Product

Additional query words: crash perfmon

Keywords: kbOSWin2000fix kbWin2kSP4fix kbbug kbfix kbWin2000preSP4Fix KB330016

Technology: kbwin2000Pro kbwin2000ProSearch kbwin2000Search kbwin2000Serv kbwin2000ServSearch

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