OESD Magic Box Instruction Manual page 20

Installation Installation
9. Choose "Search for the best driver in these locations" and
check the "Search removable media" option. Click "Next".
10. The dialog may state, "This driver is not digitally signed". This
window asks whether to stop the installation or continue. Click the
"Continue Anyway" button to proceed. This will not harm the USB
Mini Magic Box or system in any way.
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Magic Box - Design Card Converter
Software Manual