Grrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr

My msn wasn't working so I thought I'd be clever and install Live Messenger instead. That now isn't working either. And neither is something that my computer needs to show me the full joy of gmail. It has something to do with my firewall (or something. I dunno, security) but as I haven't changed anything, I am confused. And it doesn't help that I know nothing about computers. Grrrrrrrr.