How did you uninstall LW to start with? Was it through add/remove programs?
That can cause problems...the way to uninstall is via start > all programs > LimeWire & choose the uninstall option.

Try again to reinstall LW but make sure to use the offline installer. Reinstalling should remove any bits of the original version left. Then, uninstall the right way. If things are still stuffed, you might have to use your computer's search to look for all LW files & folders & delete them that way.