http://www.akascope.com/2011/07/15/free-video-editing-software/
http://savedelete.com/best-free-windows-video-editing-software.html
All Windows systems have a program called Windows Movie Maker, which to some degree can edit videos, and make quick edits to videos, adding in transitions and music with relative ease.
It's lacking in advanced features, but anybody can use it.
The other programs are for anybody looking for a bit more pizazz
http://savedelete.com/best-free-windows-video-editing-software.html
All Windows systems have a program called Windows Movie Maker, which to some degree can edit videos, and make quick edits to videos, adding in transitions and music with relative ease.
It's lacking in advanced features, but anybody can use it.
The other programs are for anybody looking for a bit more pizazz