Disable USB Access on Network Computers

we use group policy and our AV software has the ability as well.

It's not really going to stop anyone from sending files out or bringing files back into the PC.  There is email, messengers like Skype, and cloud services like Dropbox that all provide alternative means of file distribution.

While I would agree with Wayne, any of the internet methods can be controlled as well, firewall policies and content filtering along with a myriad of other technologies as well.  We dont allow external IM with Skype or any other client, we prevent access to private email and p2p filesharing like dropbox, plus we scan outbound traffic for sensitive like SSNs and Credit Card numbers.

Blocking USB is just another tool in our arsenal of security.

Thanks!