Yes. That is probably the easiest way to fix the problem. A warning though- the problem could be the work of a virus. There are many who do not like file sharing programs and seek to disable them. So...when you uninstall Limewire go back and look in your drive C(specifically "program files(Limewire))". You will find that even though you have deleted the program, Limewire has left a file behind. Be sure to delete this file before you reinstall the new program or your new program could be screwed as well. Be sure to remove or save any movies or music which may be inside first.
Good luck