i had the same problem, also with Quicktime files. I also scanned my computer and id seemed to be ok. i wonder what i could have been. Have you had a similar problem after that. It's really scary when that message shows.

omg i just posted up the same question...but I was really freaked out because it turned out to be child porn >.< and i thought the feds might be knocking at my door. I deleted limewire though...was i overreacting?