Sounds like a good theroy. Did you have the battery on trickle charge when you started your flash? Also, I had my window open and reached into the car so that I wasn't opening and closing the door while checking on the progress. Some cars are moody when flashing and power is surging to turn on the dome light. My car took a few tries to get Eurocharged tune to take but I am used to using a very different tune. The guys there walked me through it. Very good support. I too was flashing from Window XP. I would alow for a day or two if flashing daily driver incase you need to get to work the next day. They do answer support questions on weekends. Im working on running some logs soon. I put a few hundred miles on the car since the performance flash and it seems to pull a bit harder now. Sprint booster and exhaust come next!