NNGHH! Why did it work and now it doesn't?

[IZWIZZ]

Please help,
I'm pretty new to downloading stuff, but i'm becoming a bit aggravated. I installed limewire and it did what I asked and I downloaded a few tracks. Then the next time I went to try (all glowing and majestic) i couldn't even open Limewire from the icon. I'm assuming it's not firewalls and blockers and the like, cause it has worked and they're not that capricious are they? I have a brand new shiny laptop (running Vista premium), so can't conceive of it being a computer fault. Any ideas? All I can get it to do is "restore" where it just sits "enabling" for a year and a day. Sorry for sounding awfully ignoramusy. Yours,
Moi xxxx