this forum suggests i try to remove nvidia access manager to get rid of this recurrent error message. trouble is, i can't find nvidia access manager on this Vista home premium HP machine. I find a nvidia folder , but it contains drivers. no nvidia services are listed in computer management, running or not. There IS a listing for HP CUE DeviceDiscovery Service, which other blogs have indicated might cause the problem, but that service seems to serve a useful purpose and i'd rather keep it. Right now the printer IS working, but it has dropped out of my printers list a couple of times. I trust you guys and want to follow your advice. Thanks.