Movie Editing

I was wondering if there is a program out there taht can edit movies.. Because I dl'ed a Show, but for some reason it includes the Comercials with it... And I was just curious as to whether or not there is a program I could use ot just Edit out the comercials... as they are annoying...

try this site http://www.videohelp.com/edit
also what format is it in? avi./mpeg?

Nvm I got it, and I used the Default, Movie Maker that comes with Microsoft XP Pro.

But in any case it is in .mpeg ...But I got it, so thanks anyway.