To disable the access to USB port

To disable the access to USB port :

1. Click Start, and then click Run.

2. In the Open box, type regedit, and then click OK.

3. Locate, and then click the following registry key:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\

Services\UsbStor

4. In the right pane, double-click Start.

5. In the Value data box, type 4, click Hexadecimal

(if it is not already selected), and then click OK.

6. Quit Registry Editor.

To re-enable a disabled port:

1. Click Start, and then click Run.

2. In the Open box, type regedit, and then click OK.

3. Locate, and then click the following registry key:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\

Services\UsbStor

4. In the right pane, double-click Start.

5. In the Value data box, type 3, click Hexadecimal

(if it is not already selected), and then click OK.

6. Quit Registry Editor.