.NET Framework does not restrict you from running different versions of the framework on a single computer. That means that you can install all three .NET Framework 1.0, 1.1 and 2.0 on a single computer. Windows will not ask you to remove any of the prior versions before or while installing a new one.

Because of this, you need to specify to IIS the version of ASP.NET to use as default. If there have been no installations of .NET Framework previously on your computer then you can skip this step. However, if you have had any version previously installed on your computer, you may need to configure IIS to use version 2.0.

The installation setup does not update the IIS setting to the latest framework release in order to avoid any disturbance in the working of existing Web applications on the server.

Click here to watch the video for setting the IIS configuration, or read the steps listed below:

1. 
   

   Click the Start button on the taskbar and then click Run.

   
   


2. 
   

   In the Open box on Run dialog, type:
   inetmgr
   This opens the Internet Information Services manager. You can also access this from Control Panel, Administrative Tools and then double-clicking the Internet Information Services icon.

   
   


3. 
   

   In the left pane of program, expand the node below Internet Information Services representing your computer.

   
   


4. 
   

   Next, expand the node Web Sites.

   
   


5. 
   

   Select Default Web Site, right-click it and click Properties.

   
   


6. 
   

   On the Default Web Site Properties dialog, click the ASP.NET tab.

   
   


7. 
   

   If not already selected; from the ASP.NET version list, select the version number beginning with 2.0.xxxxx (where “x” represents any digit from 0-9).

   
   


8. 
   

   Click OK to apply settings and close dialog.