I have Win7 on the desktop and Win10 on the laptop. On the desktop, the installer gets to a point where it asks to install the driver for the device, I clicked install, clicked a couple of times and it said it couldn't do it. Uninstalled and re-installed the software three times. On the final time I just clicked the install device driver option about 4-5 times and then it installed.

It went through the calibration, and then gives the option to compare to a previous calibration, but there is only the new calibration in the list.

The Datacolor software I used before showed the inbuilt calibration compared to the new measured calibration. And it was quite a difference. I may be using the software incorrectly, but it is not as easy to use as the Datacolor software imho. I think the desktop is calibrated.
The laptop, which may be because how I may have set the thing up, had different issues. I got past the device driver problem of the desktop, but this time the when the software opened, it was very hard to use because when I made it full screen, the software didn't fit the screen and was hard to scroll on the screen. Then when I connected the i1 DispIay Pro the software didn't seem to see it was connected.

Lots of messing about with different USB sockets, possibly needing to get a USB hub for it to work according to the internet, but I think a couple of re-installations made it visible.
During the calibration it asks whether you can alter the brightness and contrast, I found that via a graphics program in the control panel I could. The problem was that when the X-Rite software was full screen, it didn't want to not be full screen to enable me to make changes to the settings and re-measure.

Which meant I had to go to the Task manager to stop the program and then start again to see what the Brightness level was.

Eventually got through it all on the laptop after an hour, when it should have taken less than 10 mins. Again, could not check against the previous calibration. Not sure if it is calibrated or not. I'll assume it is like the desktop.
Also, I had registered the i1 Display Pro the night before, but it was asking me to do it again on the laptop. I think I got past that by telling it was the i1 Display Pro connected.
Also, on the desktop it asked me to name the new calibration when saving, but it didn't do that on the laptop.
Hopefully this was just me having issues, as if this is the norm I can't understand how they could still be in business if this is the experience of a lot of people.

Fingers crossed you (or anyone else) don't have the problems I have had.
I am conflicted as what to do as to whether to keep or not.
