ColorMunki Photo, ( NO LIGHT UP )
For some reason mine always never works on the first usb port I plug it into on a computer, install all the software first then the update then try a different usb port - that's what works for me.
Also, when it asks me to turn the wheel thing to calibrate it I found I had to hold in the button while it was calibrating so I could turn it back at the end. Otherwise it would calibrate, I'd press the button in to move it back, it would insist on calibrating again, I would press the button - again and again. Just fyi, you'll probably see what I mean when you get to that step.