SharePoint Portal Server Setup Does Not Work with Error 0XC0070002 (295721)

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

SYMPTOMS

If you attempt to uninstall or repair SharePoint Portal Server, you may receive the following error message:

Setup failed while installing subcomponent web forms with error code 0xc0070002 (please consult the installation logs for a detailed description). You may cancel the installation or try the failed setup again.

In addition, the Microsoft Exchange setup log includes multiple references to error code 0XC007002, including some of the following entries:

Error code 0XC0070002 (2): The system cannot find the file specified.
[14:47:55] Processing file 'd:\temp\d\temp\sharepointinstall\server\web storage system\webforms.ins', at or near line 16 (OpenMachineKey:Software\Microsoft\Exchange\Setup)
Error code 0XC0070002 (2): The system cannot find the file specified.
[14:47:55] Registry file name: 'd:\temp\d\temp\sharepointinstall\server\web storage system\webforms.ins'
Error code 0XC0070002 (2): The system cannot find the file specified.
[14:47:55] Filename = '%sourcedir%\webforms' CBaseAtom::ScRefreshRegistryKeys
Error code 0XC0070002 (2): The system cannot find the file specified.
[14:51:59] Setup encountered an error during Web Storage System Core of Reinstall component task.

CAUSE

This problem can occur if the Exchange 2000 Server administration tools (also known as Exchange System Manager) have been installed and then removed. The SharePoint Portal Server Setup program looks for the following registry key, but it is not present:

HKEY_LOCAL_MACHINE\Software\Microsoft\Exchange\Setup

WORKAROUND

To work around this problem, you need to edit the registry.

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.

To work around this problem:

Start Registry Editor (Regedt32.exe).
Locate and click the following key in the registry:
HKEY_LOCAL_MACHINE\Software\Microsoft\Exchange\
On the Edit menu, click Add Key, and then add the following registry key:
Key name: Setup
Class:

NOTE: The Class field is intentionally left blank.
Click OK, and then quit Registry Editor.
Restart the server.