American Dynamics is the brand. If its a basic intellex or an ultra the fix should be the same. you will have to reset the system back to factory. to restart the sistem you will need a paper clip to press the button on the front. hold the button and unplug it. then plug it back in. let the button up. you should be able to reformat the hard drive after it has restarted. go into control panel and then my devices. select the drive or drives and click reformat. this could take up to an hour. hope it helps. if not visit tyco american dynamics on line there will be more information on there. thanks