You can protect your data from hackers.. who uses USB and get data from your personal computers
and you can block USB port due to wastes of Printing stationary.. as well as unwanted scanning etc.
just you have to follow some steps for blocking USB..
its are very simple for Punekar
Just click on start
click on run
then find HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\UsbStor
see value 'Start'
for disable USB switch value to 4
and for unable USB switch value to 3
yes it has been finish ..
I said na it is very easy for Punekar..