Format your hard-drive and clean install everything and you will be fine. And one more thing, don't let you and your friends to visit the porno sites in office PC s in the future. :) J/K. I would clear the history and all the offline files along with the cookies. Then I would run adaware or any other spyware removal s/w. I would not install toolbars like the one from google. They all suck. Uninstall them if you have and don't forget to turn on the "pop-up" blocker. You will be fine. These days professors tend to be more than happy to get some multi-dimensional students who can research and timepass at the sametime. :) Good luck! ;)