I have a MacBook Pro that has been acting funny lately, and has been slow, and my MS Office 2008 has been freezing and crashing. I recently got off the phone with my ISP, and I apparently have been using massive amounts of bandwidth. I went and took a look at my Activity Montior, and apparently, the apps that are using the most bandwidth, are Microsoft Word (#1), kernel, and Window Server. Does anyone know what could be causing this? Has my machine been hijacked. Is there any test I can run to find out what is up. I do have Sophos Anitvirus installed and running for about 6 months now, and it hasn't seemed to catch anything. Any info or suggested steps to proceed would be helpful. Thanks!