How To Install IIS7 on Windows7 and Windows Vista

I have faced issues in configuring/installing II7 on my machine (which has windows 7 installed) from Control Panel -> Program Files -> Turn Windows features on or off. It is always throwing an error message "one or more components are not installed".

To address this i found a nice(microsoft) tool Microsoft Web Platform Installer, which installs II7 in a single click.
And also it provides many other microsoft related features installation/configuration.