If you are upgrading from windows xp to windows 7 there is a change in the way you install Internet Information Services. On windows xp you would install IIS from add/remove windows components. This is different in Windows 7; it is very similar how it is done on Vista.
Go to Control Panel and click on Programs, on the following screen click on Turn Windows features on or off (see image below)
After that, select Internet Information Services and click ok
You will be presented with a progress box and when that is done you will probably need to restart you machine.
After you restarted, type http://localhost/ in the address bar of a browser and if IIS was started successfully you should see the message: Internet Information Services is running

Denis has been working with SQL Server since version 6.5. Although he worked as an ASP/JSP/ColdFusion developer before the dot com bust, he has been working exclusively as a database developer/architect since 2002. In addition to English, Denis is also fluent in Croatian and Dutch, but he can curse in many other languages and dialects (just ask the SQL optimizer) He lives in Princeton, NJ with his wife and three kids.