I tried 2 computers via the automatic way - no luck.
Go to this site
https://www.microsoft.com/en-gb/software-download/windows10ISO
Download the media creation tool.
Run it - you will be given 2 options: upgrade this pc or create media for another pc.
Go for the 2nd option.
I will download the file and then ask you to burn it to dvd.
Once you have the dvd, run the setup file (or if it asks to autorun)
You can then upgrade from that disk.
You will get a blue screen with a progress percentage, after that you'll get a black screen with a percentage in the middle
Took me at least 4 hours for each pc!