Make sure you are the administrator for the account you want limewire installed...
Then uninstall Limewire using the uninstaller which is found in start > all programs > limewire...then re-install it using the offline installer...To find the offline installer, use the link below > cancel the installer window when it pop's up and then select the offline installer link...
Lime Wire » Download LimeWire
If that does not help try deleting your preference folder...
Fixes for Limewire when LW isn't operating as it should