Josh doesn't care for Windows Movie Maker. Leo says that Windows Movie Maker has gotten a lot better over time, but in general, he'll get what he pays for.
Leo recommends a paid solution like Adobe Premiere Elements. There's also Sony Vegas. It's well worth the $80. But if all he needs to do is cut up video, he may want to try VideoLAN Movie Creator. There are other open source solutions, but they're finicky and difficult to learn. One open source option is Lightworks.