I had trouble with it on my windows 7 laptop and had to send the box in to be repaired which they took great care of me on, considering they took care of it after it’s warranty period (which I didn’t know what the period was). I started using an old xp laptop with a serial port so I could do away with the usb to serial adapter and newer os. It works fine on the 2 f-body pcm’s I mess with but this truck is still being a problem. Jet now says it may be a hardware problem with the box and say it’s out of warranty and also that it’s not any cheaper to repair the box than it is to buy a new unit. I really don’t want to have to pay what hp tuners or efi live costs after buying this and the logger as well as viewer, but maybe what’s in the cards.