That is cool! I have not used Windows 8 to make movies yet and I have never used Windows 7 at all.
In (all versions of) XP there is Intervideo WinDVD creator included with all the machines I own and I have used that. It s quite basic and a bit clunky but it works.
I have also tried several different stand-alone aftermarket DVD compilation/authoring programs and the one I like the best is Pinnacle Studio. It has a short learning curve and is relatively easy to use. Menus and scenes can be create easily and audio can be dubbed over the existing audio on a separate track.
I have created SEVERAL movies and DVDs with this program and I like it very much. Matter of fact, sometimes I use WinDVD creator AND Pinnacle because some little functions are better in one than the other and sometimes video that I recorded through the on-board tuner card (sort of like Tivo) works better with WinDVD.
On the other hand creating files from my Sony Digital-8 Video Camera works best in Pinnacle. The software recognizes the camera and all the playback functions can be controlled through the software when it is connected with the firewire cable.