Hi
Hmm, very strange, this is normal related to missing driver for the cable but since you have updated the firmware it should be fine.
Don't worry we will sort this out, I will ask you some question first.
1: Did you use RCS64 top update FW?if not what version off FW did you update your C7042 power base with?
2: In your device manager, did your cable show up with a Comport.
3: Does your PC have special permissions for your user?
4: Try startup RCS64 by Right click on the Icaon and Choose "Run as administrator".
Let me know how it goes
Martin