If the scanner has been attached to PC and the software was installed as well, then you need to make sure the drivers are installed also. To check this, go to Start > Run > devmgmt.msc. If you see a yellow device, right-click it and select Update Driver. If the drivers were installed properly, the scanner should install normally.
Additionally, get in touch with the party that sold you the device and request that they provide you with the necessary software and drivers. The capture becomes available when then device is properly installed on the target PC.