It is most definitely one of the files you downloaded, and will most likely be less than 1 MB in size but still have the name of the thing that you were looking for in the first place. Probably it's a zip file as well.

Just deleting the file won't help as you are already infected. You off course need to delete it so you don't share it with others. Uninstalling Limewire until this is fixed may be a good idea as well.

Try some of the fixes in that thread I posted the link to, or if you don't know how to do some of those things then go to Norbies world. He can help you get rid of it. Step 5 in that same thread