Microsoft KB Archive/301919

= PRB: Cannot Expand &quot;My Computer&quot; in Component Services MMC Snap-In =

Article ID: 301919

Article Last Modified on 3/24/2003

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APPLIES TO


 * Microsoft COM+ 1.0

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This article was previously published under Q301919



SYMPTOMS
IMPORTANT: This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:

256986 Description of the Microsoft Windows Registry

When you open the Component Services Microsoft Management Console (MMC) in Microsoft Windows 2000 and click to expand the Component Services and Computers nodes, you may receive the following error message:

Catalog error - An error occurred while processing the last operation: 80040154, Class not registered.

In addition, you may encounter the following symptoms:
 * Some or all Active Server Pages (ASP) pages stop responding (hang) or cause 100 percent CPU utilization when they run in Medium or High application protection.
 * The same ASP pages will work if the Web site is placed in Low application protection (for example, the Inetinfo.exe process).
 * If you click Start, point to Programs, click Administrative tools, and then click Component Services, it does not open.



RESOLUTION
To resolve this problem, reinstall Component Services as follows: WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.
 * 1) Open registry editor, locate HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\COM3, and then delete this key.
 * 2) From the Start menu, point to Settings, click Control Panel, and then click Add/Remove Programs.
 * 3) Click Add/Remove Windows Components.
 * 4) Proceed through the wizard, and accept all of the defaults.
 * 5) Restart the computer.

