How to register ASP.NET on IIS after installing the .NET Framework

If you install the .NET Framework on a system that has IIS already installed, IIS is automatically configured to handle requests to ASP.NET pages.
If for some reason is not installed, there is a tool that can do the job for you.
The utility is aspnet_regiis.exe, it is located under %WindowsDir%\Microsoft.NET\Framework\vx.y.zzzz\ and you should call it with the -i parameter in the command window, as showed below:

C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\aspnet_regiis.exe -i