I had the same problem and uninstalled java and reinstalled it. I also disabled pop up blocker in windows ie7. Then after that I installed limewire and now it works. One other thing - It changed my color scheme temporarily because its not compatible with Vista aero. Very Strange..... and it still won't install frostwire but I'm happy with my outcome thus far. The funny thing is limewire was working fine then all of the sudden a week or two ago it crashed on startup. Hope this helps.