Internet Information Services (IIS) can be installed on a Windows 7 Professional operating system using Turn on Windows Features On or Off.
Click the Start menu and click Control Panel. Navigate and select Programs link in the Control Panel Window.
In the Programs Windows, navigate to Programs and Features section and click the Turn Windows features on or off link.
The following Windows Features window will be displayed. Navigate to Internet Information Services node and select the required features.
After selecting the required options, click OK button to confirm the changes. The below confirmation window will be displayed and the IIS will be installed on the Windows Professional machine.