I would suggest to uninstall both the Java & LW. Uninstall Java using the Add/Remove prog control panel. Uninstall LW by going to Start menu>Programs>LW>Uninstaller. Then downld the installers & save them to your comp. Don't install over the net. Then install Java. Then install LW & reboot. If still problems then remove Java 1.5 & go back to version 1.4.2 (link to it in the link you supplied above.)

Oh before you do all this, try opening LW once more & then press Control-Alt-Delete keys & open Process Manager & see how many times limewire is listed. If it's listed more than once then kill all of these LW processes. Then search your comp for other versions of LW.