My computer is running at 99% according to iStat due to a process called MDNS. According to Activity Monitor and "top" there is no such process running at 99%. I've tried killed MDNS_Responder and anything with MDNS in it's name via Activity Monitor and restarting the Macbook, doesn't fix anything. I've also removed any applications recently installed, doesn't work either. Any ideas what could be causing this? I highly doubt it's an exploit or virus, I'm very careful about what I download.