"devcon driverfiles" doesnt work on some devices

Hi,

i found out that devcon does not work on some devices when i drop the “driverfiles” parameter on a DeviceID. It says that it could not find any matching drivers for the device. But The property tab/sheet on the device manager holds a button that onclick displays a dialog with a driver for the device. How does device manager do that or where can the information be accessed for the driver?

TIA

K.