Sorry to sound irritated over this BUT I am a retired computer professional and if I can't this damn thing installed, how are others doing it? I spent a lot of good money on Powerlogger and a Wide Band O2 and their installation, picked the car up and it doesn't work. They got it up and running on a Windows 7 machine but my new computer is Windows 8. I have spent all day reading and reading and I understand the Driver Signature issue and did the routine shown to disable that feature. Then I couldn't find the driver file on the CD sent me. After a few more hours research I found where I could download it. Did that, unzipped it and went back to the car. Plugged it in and tried to find the 2 devices to assign drivers to but they aren't even in the Device Manager. So now what do I do??