Yeah, for those of you having problems.
1. If it says the file is incomplete, I can only say download the file again, and make sure you downloaded the newest (2.42) version of Blender.
2. If you are having trouble with the interface not showing up, check to make sure you don't have manual Antialiasing settings going on your graphics card.
Also, if you have an older ATI graphics card, there are some known issues between it and Blender. There are work arounds, but you kind of have to know what you are doing with catalyst drivers for ATI graphics cards. Unfortunately I've never had this problem, and don't know anything about fixing it, however if you go to www.blenderartists.org
and go into the forums and SEARCH for ATI and fix, you should find your answers. DO NOT GO IN AND POST "HOW DO I FIX MY ATI CARD?"!!! Search for it. Trust me, it's one of those touchy things people get upset about being asked when it can be searched for.