Lock down all USB ports!
NetWrix USB Blocker enforces centralized access control to prevent unauthorized use of removable media that connects to computer USB ports, for example, memory sticks, removable hard disks, iPods, and more. USB port access control is a very important aspect of your endpoint security, no matter how good your antivirus and firewall are.
NetWrix Corporation is a highly specialized provider of solutions for IT infrastructure change auditing. The USB device lockdown protects your network against malware and prevents theft of sensitive corporate data.
Read more and download a free copy from - http://www.netwrix.com/usb_blocker_freeware.html