I'm not speaking with any authority here, bur i suspect it is a virus that causes the problem. I have the same problem, I'm sharing hundreds of files i dont know, all in a folder named ' in my system folders. All the files are zipped and about 113 kb big, which is impossible since some files claim to be movies(?). Even if delete these files they reappear when I turn my computer on again, i also cant delete the folder because it's hidden and stay that way no matter what i do. I also cant access my options menu in LW, so i have little control over shared files and unknown downloads. The best solution would be just to run a good antivirus program