See
Fixes for Limewire
If you need to re-install LW, then uninstall it 1st using uninstaller (Start menu>Programs>LW>Uninstaller) That's if it's LW version 4.4 or later. If it's an earlier version then use your Add/Remove Programs control panel to remove it.
Then download both Java & LW & save them to your computer. Don't install over the net. Then after installing LW, do a reboot.