Hi I'm using BitDefender Total Security 2011 for couple of days now and I have couple of questions.But first, I had this message on my screen when I tried to reboot my system: BD switch agent error ...end process.I ended the process and rebooted normally but I have a feeling that my computer is slow like before I did complete format of my HD and than installed a fresh copy of Windows XP sp3 and BitDefender Total Security 2011.I don't have multiple users (as far as I know) so why is this thing active and if there is another user (hacker attack or something...) what should I do?