My advice: uninstall everything, including Limewire. You shouldnt have to reinstall Java once you have installed Limewire as Limewire automatically installs the java for you and if I were you I'd run a check for any viruses. This might take sometime but it sounds like you pickedup something during your install or you clicked on something to download and it may have given you a virus and or trojan.

Do a complete uninstall, delete any leftover LW folders and or java, scan/defrag your system and run a virus check before you do a fresh, clean install of Limewire.