In order for FireAcad Inc. software to work, it needs a USB Security Lock. The USB Security Lock is tied to a computer specific. No other computers can use the same USB Security Lock to install the software. The user must always have the USB Security Lock plugged in at all time. Failure to do so, will result in the program not functioning. It removed often, can result in the USB Security Lock being burnt. This will then require the user to send the lock back to FireAcad Inc.