1- Go to Add or Remove Programs

Start / Control Panel / Add or Remove Programs

2- Go to the Add/Remove Windows Components

In the Add or Remove Programs window click on Add/Remove Windows Components

3- Select Internet Information Services to install

Double click on Application Server

Double click on Internet Information Services (IIS)

Make sure, that you select ASP.NET, Enable COM+access and Internet Information Services (IIS)

If you have installed IIS version 7 (by default with Vista and Windows 2008), you have to install the IIS6 Management compatibility console.

To install IIS on Windows 2008 Server

•Click Start, point to Administrative Tools and click Server Manager.

•Click Add Roles.

•The Add Roles Wizard will appear. Click Next.

•If any required features are missing, you will be prompted to install them by clicking the Add Required Features button.

•From the Select Server Roles window, click the box beside the Web Server (IIS) option. Additionally select Application Server which will install ASP.NET 3.5.1 Also select Web Server (IIS) support. Click Next.

Install  ASP.NET  3.5.1

•Click Next.

•Select the specific role services to install for IIS. Also select ASP.NET and IIS6 Management compatibility console. If you are unsure what a service is for, select the service and a short description will appear.

•Click Next.

•Review your installation selections and click Install.

•When the installation is complete, review the results in the ‘Installation Results’ window and click Close.