start\run\regedit:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\USBSTOR
right-click on USBSTOR permissions - advanced - add -
Enter the object name "select a logged-on user"
Allow Full Control
OK
Now try to change:
"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\UsbStor" "Start=3"