if ur in winblows 7, u go to start - control panel - system - then click device manager in top right of ur screen... make sure the device is plugged in and in ftm mode. In device manager u will see a unknown device with an exclamation point on it where usb controllers is. Right click that device, then click update driver software, then click browse my computer for driver software, then browse button on right, and go to the folder u unzipped the USB drivers for your device and select that folder and click OK. The browse for folder dialog box will disappear magically, then click the "include subfolders" checkbox so that it's enabled, should be enabled by default. then click next. it should install the drivers for u