Error message when you try to visit a SharePoint Portal Server 2003 site: "This Windows SharePoint Services virtual server has not been configured for use with ASP.NET 2.0.50727.42"

You install the Microsoft .NET Framework 2.0 on a computer that is running Microsoft Office SharePoint Portal Server 2003. When you try to visit a SharePoint Portal Server 2003 site, you receive the following error message:

This issue occurs if the .NET Framework 2.0 is loaded in the system memory instead of ASP.NET 1.1. The error occurs because configuration changes that are required for the .NET Framework 2.0 are missing in the Web.config file.

To work around this issue, follow these steps:

1. Click Start, point to Administrative Tools, and then click Internet Information Services (IIS) Manager.
2. In Internet Information Services (IIS) Manager, expand ServerName (local computer), and then click Web Server Extensions.
3. In the results pane, click ASP.NET v1.1.4322, and then click Allow.
4. In Windows Explorer, locate the folder that contains the W3wp.exe file. By default the W3wp.exe file is located in the following folder:
   %Windir%\system32\inetsrv
5. In Windows Explorer, click File, point to New, and then click Text Document.
6. Rename the new text document to W3wp.exe.config.
7. Open the W3wp.exe.config file in Notepad.
8. Copy the following text, and then paste it to the W3wp.exe.config file:

   <?xml version="1.0"?>
   <configuration>
   <startup>
   <supportedRuntime version="v1.1.4322"/>
   <requiredRuntime version="v1.1.4322"/>
   </startup>
   </configuration>

9. On the File menu, click Save.
10. In Internet Information Services (IIS) Manager, right-click ServerName (local computer), click All Tasks, and then click Restart IIS.