How can Disable USB port(mannully):

1. Goto run

2. Type 'regedit' without quotes

3. Click on HKEY_LOCAL_MACHINE

4. goto SYSTEM

5. Click on CurrentControlSet

6. Click on services

7. Goto USBSTOR

8. Double click on 'Start' where value
is 3

9. Now change the value data with 4

10. Now press ok and refresh your
desktop your USB port is disabled,to
enable the usb port replace the value
4 with 3.