Whenever you deploy a website to IIS 7 that is not compliant with the IIS 7 integrated pipeline, you will get an error like this one:

Not the great error message you get. It actually gives you the solution right away: Migrate Web.config to support the integrated pipeline. To do that, start a command prompt, and execute:

%SystemRoot%\system32\inetsrv\appcmd migrate config "test/"

After doing this, our Web.config is changed to support the IIS 7 integrated pipeline and we can see the website.