If you see Limewire running in the task manager select the end process now option...
Make sure you also uninstalled limewire using the correct method...
Try these tips in this order...
Uninstall all versions of Java from the add/remove programs and then re-install the JRE 5.11 offline version....
Archive: Download Java 2 Platform Standard Edition (J2SE) 5.0 Update 11
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 with your problem try deleting your preference folder/s...
Fixes for Limewire when LW isn't operating as it should LimeWire Pref Folder in Vista