Drivers limitation for the USB-Tuneboy-cable (Windows System):
The TuneBoy cable works only with the ancient FTDI driver from TuneBoy's own site.
For WIN8/8.1 unfortunately, the tuneboy driver is to install only with a trick. See here.
The problem is the enforced driver signing in Windows8 & Windows 8.1.
The hardware id of TuneBoy cable is different vs. a generic/TuneECU FTDI cable.
So even though both cables have same chip, the TuneBoy cable needs the matching
driver from the TuneBoy site.