Been watching coz all my friends are having , how do I remove it from my pc so it can't be traced!!!!!

if you are using the latest internet explorer...go to internet properties...pick Delete history...Delete temporary files-cookies and history.....if you are using another browser..try finding temperoray files and cookies "thy usually hidden" in your c/decomants and setting/"USER account name" that's the simpliest way to remove stuff that you stored from internet sites ...etc