I have used a few video editing programs and the easiest one has been DVD Slideshow Builder. Very easy to use with professional features and same sort of layout as Movie Maker however a lot more powerful.
Everything is laid out in an easy to follow step by step instruction.
Supported output video formats:MP4, AVI, WMV, 3GP, MPEG, MKV, MOV, FLV, F4V, SWF;
Supported intput video formats:3GP, ASF, DAT,FLV, MOV, MPEG, MPG, MP4, WMV, AVI, M4V, MKV
Highlights:
250+ picture movie styles,custom transition and pan/zoom effects.
Edit photos and videos with built-in tools, like crop, rotate, apply effects, etc
One-click to auto-synchronize video and audio
http://www.ourpix.com/dvd-slideshow-builder.html#150