I am having this problem as well. I used the free Limewire for a long time and it was fine. I upgraded to Limewire Pro last month and I can't launch it - I'm running Microsoft 2000 Pro and my online provider is AOL. When I want to use Limewire I have to reinstall it everytime - what a total pain! I get this "LimewireWin.exe has generated errors and will be closed" message. I sure would appreciate any help.