After you install and enable the Routing and Remote Access service on a Windows 2000-based server, the service does not start. The following event ID message may be logged in Event Viewer.
Event ID: 20103 Source: Router Description: Unable to load C:\Winnt\System32\Iprtrmgr.dll
In addition, the available ports may not be displayed in the Ports container in the Routing and Remote Access service management tool.
Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
322756 How to back up and restore the registry in Windows
To resolve this problem, use the following troubleshooting procedure:
Start Registry Editor (Regedt32.exe), and then verify that the following registry key is present: