Disable CD/DVD or USB drive Autorun

1) Click Start, Run and enter GPEDIT.MSC
2) Go to Computer Configuration, then-> Administrative Templates,

---> System.
3) Locate the entry for Turn autoplay off. Double click on it

4) Click on Enable.

5) Select All Drives to disable all drives including Usb drives or only Cd Rom drive.

6) Now click on apply