there is and its easy:
DL the Ztex SDK and let windows search for the driver of that unknown device (you have to point it to the ztex directory -> i dont remeber the full path, but it had something to do with libusb ..... <-

What am I missing... ?
I try to update the driver to the Unknownd device with the driver in the SDK "
ztex-120412\ztex\libusb-win32\ztex.inf"
https://dl.dropbox.com/u/704649/ztex%20driver.pngbut only get a message that
"
The folder doesn't contain any driver that is campatible with the device. If there is a driver in the folder, check that the driver is designed för Windows x64 based computers."
https://dl.dropbox.com/u/704649/ztex%20driver2.pngAny suggestions...?