Block And Unblock Your Computer's USB Ports.

 

 Follow the simple below steps.

1) First click start button then click run.
2) Now in the search box type regedit and click OK.
3. Now go to below location in registry key:
* HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\UsbStor.
4) Now see the right side and open start.
5) Now in the value data box type 4 (to block USB port) and then click ok.
6) Quit Registry Editor.
7) It would be good to restart your computer to take effect.

 To unblock a blocked USB port:

1) First click start button and then click run.
2) Now in the search box type regedit then click ok.
3) Now go to below location in registry key:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\UsbStor
4) Now see the right side and open start.
5) Now in the value dada box type 3 (to unblock USB port) then click ok.
6) Quit Registry Editor.
7) It would be good to restart your computer to take effect.