Searching drivers for grafical pad

Yesterday I went to a shop to buy a grafical pad (a tablet with a pencil).
A software-disc with a driver is included, but I am not happy with the control of the device.

Does anyone know where I can find drivers for these things ??
I have a Medion MD9570 and I already looked on www.medion.com but there are no drivers or updates.

Thanx in advance !!