How to Disable USB

a) Click on Start

   • Run

     • Type Regedit

b)Go to

   • HKEY_LOCAL_MACHINE

     • SYSTEM

       • CurrentControlSet

         • Services

           • USBSTOR

--->Right side,you have to find Start

       • Then right click modify->Value name "start" Value data "3".

          Press ok

  To enable it type 4 in that start value...!!!