Go to run and type gpedit.msc command
You will see the Group Policy window. Then select Administrative Templates \ System in the tree
You will see an item in the right side pane called “Turn off Autoplay”
Double click on that item, and set the radio button to Enabled, and change the “Turn off Autoplay on” to All Drives.
Now you have disable autorun of usb and cds on your windows
If you have problem check here
http://www.howtogeek.com/howto/windows/disable-autoplay-of-audio-cds-and-usb-drives/