As long as you're careful with what you download in Limewire removing the firewall should pose no problem at all. If you use the Windows firewall then Limewire should automatically except itself from being firewalled, meaning that you don't run the risk of letting in nasty viruses from anywhere else. If you don't have the Windows firewall then a visit to the website of your firewall or anti-virus provider is an idea. They know far more than I do. I think it's certainly worth a try.