Only problem i see Richard is that there are multiple sub-keys on some that have the Control key so that is not a valid check to get correct device. Or maybe that is just on laptops. But on mine there are 3 subkeys, all have control, but only one returns a model. Using the WMI like i did in previous posts doesnt always bring back the key with the model in it either. So Im not sure if there is any way to be sure which key to retrieve info from.