How to disable access to USB ports

1. Click on Start.
2. Start Run.
3. Type regedit. This will launch the Registry Editor.
4. Navigate to  HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\usbstor.
5. In the work area, double click on Start.

6. In the Value Data box, enter 4.
7. Click on OK.
8. Close Registry Editor and refresh your desktop.
Now your USB ports are disabled hence people can't take out data without your permission
9. To re-enable access to your USB ports, enter 3 in the Value Data box in Step 6.

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