"Computer Name Not Found" Using Performance Monitor

ID: Q241110

The information in this article applies to:
  • Microsoft Windows NT Server version 4.0
IMPORTANT: This article contains information about editing the registry. Before you edit the registry, make sure you understand how to restore it if a problem occurs. For information about how to do this, view the "Restoring the Registry" Help topic in Regedit.exe or the "Restoring a Registry Key" Help topic in Regedt32.exe.

SYMPTOMS

When you attempt to run Performance Monitor locally or to monitor a remote Windows NT-based computer, you may receive the following error message:

Computer name not found


CAUSE

This error message can occur for any of the following reasons:

  • Client network connectivity problems


  • NetBIOS name resolution problems


  • Problems with registry permissions


  • Corrupted settings files for Performance Monitor



RESOLUTION

Check NetBIOS Name Resolution

Check NetBIOS name resolution and network connectivity first by typing the following command at a command prompt
net view \\computername
where computername is the computer to which you are trying to connect with Performance Monitor.

Issue this command over the network and at the target computer. If the command works successfully and you see a list of the shared resources on the server, try the following method.

Check Registry Permissions

WARNING: Using Registry Editor incorrectly can cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk.

For information about how to edit the registry, view the "Changing Keys and Values" Help topic in Registry Editor (Regedit.exe) or the "Add and Delete Information in the Registry" and "Edit Registry Data" Help topics in Regedt32.exe. Note that you should back up the registry before you edit it. If you are running Windows NT, you should also update your Emergency Repair Disk (ERD).

Start Registry Editor (Regedt32.exe) and check the permissions on the following registry key:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurePipeServers\Winreg
Administrators should have full control by default.

For additional information about modifying permissions, click the article number below to view the article in the Microsoft Knowledge Base:
Q164018 Controlling Remote Performance Monitor Access to WinNT Servers

Check or Replace Files

  1. In the %SystemRoot%\System32 folder, rename the Perfc009.dat file to Perfc009.old. Rename the Perfh009.dat file to Perfh009.old.


  2. Copy the Perfc009.da_ and Perfh009.da_ files from the Windows NT 4.0 CD-ROM to the %SystemRoot%\System32 folder on the local computer.


  3. At a command prompt, type the following lines in the %SystemRoot%\System32 folder, pressing ENTER after each line:


    4. Expand.exe Perfc009.da_ Perfc009.dat
    Expand.exe Perfh009.da_ Perfh009.dat
    NOTE: If replacing the Perfc009.dat file corrects the problem, you must reinstall your counters for any program that you have installed previously and want to monitor.
For additional information about Microsoft Exchange counters, click the article number below to view the article in the Microsoft Knowledge Base:
Q156494 Restoring Lost Performance Counters for Exchange
For additional information about Microsoft SQL Server counters, click the article number below to view the article in the Microsoft Knowledge Base:
Q227662 SQL Performance Monitor Counters Missing
Follow the steps in the "Problems with Performance Monitor Files" section.

Additional query words: perfmon

Keywords : kberrmsg kbtool
Version : winnt:4.0
Platform : winnt
Issue type : kbprb


Last Reviewed: November 10, 1999
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