Actually, no. .NET 3.5 is included in Win7, but not 4.0 or 4.5. (You can add either one you want, if either, but not both, since 4.5 completely replaces 4.0.)
The easiest way to add whichever one you want is to use an installer or addon that is already updated with all the available updates, such as this one, or this one, or this one. They are made to install on an already installed OS, or at least after first log on. As a newbie, you might be more comfortable with this one, which is made specifically to be used with Win Toolkit, but Win Toolkit can be made to use any of the others as well, if you prefer. I know Rick's are all up to date, but I'm not positive about the other one. Good luck!
