Turn off file sharing. Visit distributed.net for more information. Give your web admin h*ll for not running tighter security.
In the interest of system security I have gone to using 2Gig HD's in swap out drives. One for web-cruising/email, one for AH, and then a 120Gig high speed drive for offline gaming, graphics work, programming, etc. (no internet programs even installed). That keeps everything safer, but still not absolutely safe.
It's gonna get worse, guys! A new hacker is born everyday!
