I downloaded the installer here and when it was installing it first asked me with checkboxes what Windows Live components I wanted to install. None of them in my case since they list everything BUT Movie Maker.

I then searched Microsofts site and appearently you have to install ALL of the components to get the privilege of working the bugs out of the beta. I don't use any of the components and I have other apps installed to do most of the functionality of Windows Live and don't feel like manually reassigning default apps and wasting HDD space.

Baaaaad move Microsoft, Bad move.