I am a Linux newbie. I have had some problems with unexplained devices and several other things that return after a format and re-install. I am referring to machines that had originally been running Win 7 64bit SP1. I recently ran Mint 15 using Mate after a complete format. After some time I realized I was getting updates for Gnome and KDE. I then found "System tools backend" I am pretty sure this is what the culprit used to compromise my machines. I now need to know why it lives through a format and re-install. Thanks for your time.