The Prerequisites window allows you to bootstrap all of the necessary components needed by your application before users install it. You can specify from where the prerequisites will download (see Figure 1-10).
Figure 1-10. Specifying the components your application needs
For example, if your users do not have the .NET 2.0 Framework pre-installed on their computers, they will first be prompted to download and install it before installing your application. All of the downloading and installations present to your users as one single installation process, so your users do not need to worry about installing each individual prerequisite.