If the administrator is smart, then he would definitely do this to ensure a tight blockade. He would alter the settings through regedit command on Run console. Now how do you unlock it? You have to go right into where the administrator has been. Here is how.
- Go to Start > Run, type “regedit” and press enter to open the registry editor
- Navigate to the following key
In the right pane, select Start and change the value to 3. (The value 4 will disable USB Storage). Click OK. This will re-enable USB Ports and allow you to use USB or Pen drives.