This has happened with what I have tried so far: Debian and Ubuntu. I have been accustomed to my network card being auto-detected and the internet being automatically connected with an installation, but I am not getting internet on installation, so much of the installation has failed. This machine was set up as a dual boot, and is running Windows 10 with the latest updates. It has previously run a version of Ubuntu Studio, but with this upgrade (first by USB then by DVD), I am not getting a network, and so the installation remains half-finished. Somehow, after changing this over to Debian, where the installation failed for the same reason, Windows 10 EFI detected the incomplete installation and now offers "finishing the Debian installation" as a boot option when I reboot. It seems the root of my problem is in Microsoft's choice to take over the EFI in a recent update, thereby supplanting GRUB, which was there before. GRUB was a technology I understood fairly well; EFI is not. Can anyone suggest, or point to some resources, for how to install Linux alongside W10, in a way that the EFI appears to recognize (since it seemed to almost accidentally with Debian). Thanks Paul