Can you confirm which build version of Ghost you are deploying? Also what operating systems are being used on your laptops.
You refer to garbage names in your subject line but make no mention of this in your main text. Error reading machine information suggests nothing is being returned.
Perhaps if you can take the time to specify exactly what information is being returned, and what information should be returned, we can have a better chance of helping you.
Finally, do these machines have vendor installed operating systems or are you using your own builds?