If it says that there is still an instance of LW running, you should open your Task Manager (ctrl&alt + delete one time) and then go to Processes and look for the limewire.exe process. If it's there, force it to end...
By the way, if you removed LW using the Add/Remove function of the control panel....well,.....bad mistake.....
If you still can't get rid of the old version you have to do some more work.
Go START>Search for Files And Folders and look first for the folder " .limewire " (yep that dot needs to be in front of that word) and then " LimeWire " including also the hidden folders into your search. If you find one or both on your system, delete them.
Next go to START>Run and type " regedit " and there you search for " limewire " and delete any entry you find.
Then restart your computer.
Afterwards uninstall all Java version of your system, download the newest version from Sun Micro (using the JRE offline installer):
Java Technology
Install it and reboot again. Then install the newest version of LW using the offline installer downloaded from here:
Lime Wire » Official Website & Free Download, BitTorrent «
Cheers
FOTH
