hi there i had the same problem. this is how i think i fixed it.
download a squared or avast! these to are anti virus programs.
install one of them. do a search of your computer for malware,
(malware is spyware, adware......), delete anything that comes up. uninstall limewire. search your computer again.delete anything that comes up. install limewire. this should work.

PS. if you are trying to download a program off limewire don't download one thatis less than 1mb or 1,000kb OK

plz post new thread if this does or doesn't work.
niko