So I bought a new computer with Vista home edition and downloaded limewire. I moved some movie files from my old comp to new one (old comp is windows XP). Now some of the movies wont even play and when I download a new movie on new computer and when its complete I click on the movie file and nothing happens (through limewire). No problems playing any of the old or even new music files. Is there a fix to this or is it a Vista thing?

You may need to reset your defaults for playing video files. I'm not sure how to do that on Vista, but other os's Setting Default video app. Also make sure you have a decent video player. We recommend VLC but if prefer using WMP then get the VISTA codecs; see them listed here CODECs list and alternate players for Movies