Are you using Vista ??
Have you checked your shared folder outside of limewire ?? To do this click on one of your files in your limewrie library and click explore it will open your shared folder up....
What do you see ?? Do you see alot of zip files ??
If you do you have a virus...Have you run an AV scan??
What AV are you using ?? The only AV that I know of to get rid of this virus is AVG, it is free...So if you aren't running that AV the best thing to do is disable the one you have and download AVG, scan your computer, get rid of the virus and then you can unistall AVG and make your normal AV active again...
AVG download.....
http://free.grisoft.com/doc/2/lng/us/tpl/v5