Internet Information Services (IIS)
If you have Windows 2000 or Windows XP Professional, you may have IIS already installed in your computer. IIS is part of the Windows operating system, but it is not selected by default. So, if you choose default options when you installed the operating system, you may not have the IIS installed.
To find if you already have IIS installed, go to the "Control Panel" and select "Administrative Tools". Check if there is a shortcut for "Internet Information Services" exists as part of the "Administrative Tools". If it does not exist, you will need to install IIS.
To install IIS, go to the "Control Panel" and select "Add Remove Programs". Select the option "Add/Remove Windows Components". Make sure the option "Internet Information Services (IIS)" is selected. If it is already selected, that means you already have IIS ! If the checkbox for IIS is not checked, select it and press the "Next" button to proceed to install.
The Windows Components Installation Wizard may prompt you to insert the CD for WIndows. So, keep the Windows CD handy. Or, if you have the I386 folder copied in your hard drive, you can use that when you are prompted to insert the CD.