A friend suspects his computer has been 'hijacked'. Way he explained it is this. His D drive is almost full. His computer flashes the lights on his hard drive even when he has logged off and has been logged off for hours. He's using XE, and even the use of Spybot S + D hasn't helped. He can't get to his Norton Virus Protector. Is it possible someone has hacked his PC and is accessing it when he writes or uses the machine?