A lesson learned - DO NOT power your laptop from a 12v car adaptor whist diagnosing your car with an interface that is connected directly to the laptop via usb.
I done that yesterday and the second i plugged the power adaptor into the cigar lighter socket i knew i had a problem. The car engine nearly cut out, various warning lights on the dash, and the car radio went nuts. I quickly unplugged the adaptor and all returned to normal with the car (Thankfully) I could not work out what had happened, then it suddenly dawned on me that i might have caused some kind of weird ground loop - 12v ground from car goes through the inverter in the adaptor, then the modified ground gets fed back through usb cable and the F-Super to the cars ground. A quick search on Google brought this up - http://www.ross-tech.../warn-12v.html
I think that might confirm my theory! It is for a different car, along with a different scan tool, but the problem would be the same in my case.
Sadly my F-Super interface does not appear to functioning properly anymore, it's throwing up codes that do not seem to be true, for example, codes that state ABS pump failure, along with the failure of all four ABS sensors, plus a few engine codes that were not there before. The ABS light is not on - apart from it's usual 2 second self-test when i start the engine.In fact i had only just finished using the F-Super to diagnose a rear sensor failure (All other times i had used the laptops internal battery). I replaced the rear sensor and it fixed the fault. I got fed up with the laptop battery going flat - old laptop - knackered battery, seeing that i only ever use the laptop for diagnosing car probs i thought i would save a few quid and just get a car adaptor, rather than a new battery. The adaptor arrived yesterday, so i thought it was a good time to go and sort out an evap error code i noticed whilst sorting the ABS out. Perfect time to check the new adaptor worked ok.
Oh well, lesson learned, and thankfully the F-Super seems to be the only casualty. Hope this stops someone else making the same mistake!