@Bas: I also already installed VS, but there is no entry for .Net 4.5 in Add/Remove Programs (only the multi-targeting pack), so it's a given that .Net 4.5 is included.

Also, several optional features of .Net 4.5 (appears to be stuff that's not part of the Client Framework like ASP.NET) appear under the "Turn Windows features on or off" dialog (.Net 3.5 also appears there, but is not selected by default, like you I got a prompt to install it when I installed the Windows Essentials).