My suggestion is to check your permissions for limewire- for some reason your computer or you may have accidentally messed with it.
go c/progs/limewire
right click the entire limewire folder, go to properties> security
and itll come up with your permissions. Double check 'system', 'admin' and 'user' have full control. If not, change it to full control by clicking "edit" just below it, and then changing as needed for each of the above. Click ok, close and then do the above for the actual "limewire.exe" program.
Then try to uninstall it again.
Hope that helps, that seems like the most obvious issue that would prevent you uninstalling it.