Thanks very much for your help. I have now increased the memory allocation for LimeWire and have updated my Java. Still having the problem however but it's still good to have done the above. I have a feeling that it's something to do with a firewall issue. When I try to browse only certain hosts, a box comes up that only says "Error" at the top and nothing else. It's like it isn't able to complete the warning and I'm not even able to close the box or force quit the application. At that point everything is frozen and the only thing that I can do is use a paper clip to restart.