Hello guys, Firstable, thanks for posting on this forum. I have hesitated a long time before to buy a Mac, surfed a lot here for informations, and finally bough one 6 months ago. (I don't know much about computer in general and English isn't my first language so sorry for maybe approximative vocabulary below) So, and but ... I am so happy with my Mac,it's working so well by itself, and persannaly have been so busy that I didn't have time to try to discover how it "works". So far only the "apparently" classical IP address problem in public places(!) if anybody got a solution for this one, would be happy of it BUT, i apparently (!!!), and not voluntarely share files with " tangxianlu-tosh " and " chinese-a15ac45 " snapshot below. After my last sofware update, I noticed them on my "shared part", tied to click on it, gave me a failed connection, they disappeared, reappeared and them ... disappeared again ... I did two quick search on the net and didn 't find anything about nowhere ... which worries me even more ... Is that normal??? is it a hack??? and if yes what can I do of it??? Thanks a lot for some anwers.