Open Registry ' Expand HKLM ' Expand System ' Expand CurrentControlSet ' Expand Services.Scroll down to find "USBSTOR"Right Click on "USBSTOR" and click on PermissionsClick on AdvancedCheck box "Inherit from parent the permission entries that apply to child objects. Include these with entries explicitly defined here"Click on Apply Click on OKSelect USBSTOR and on the Right side double click on start and set the value data to 3 Value data: 3 to enable and 4 to disable (USB Mass storage device)...