I've recently posted that over the weekend I reformatted my mac, as it had been getting a little snarled up but nothing too bad. Since then it keeps randomly freezing, in programmes (so far opera, firefox, internet explorer and msn messenger). I haven't a clue what I've done. As far as I'm aware I've not coppied any old preferences over to it, I fixed my disk permissions (of which there were a fair few considering it had only been formatted a day before) Could this be a virus or something? I do have Norton on here, but perhaps it's not the most reliable copy. Please help I'm really stuck!