You can consult a Hardware Expert, Sometimes minute hardware missing can reject an entire operating system install. In windows example, the Trusted Platform Module (TPM) version 2.0 is needed to install Win 11. As you mentioned it has no WiFi and Ethernet then think what else might be missing. It is not always the Software
AHCI is enabled, my other option is ATA
Secure Virtual Machine is disabled
Nothing enabled on the bios security tab
Fast boot not available in the bios, Win7 has no setting for this feature (think it came along in Win8 or 10.
I got his machine from someone who, from the amount of dust inside, had never opened it. I cleaned it out, re pasted the CPU, put in a video card, and booted it up into Windows 7. They previous owner had done a clean install. It's running fine, on the network.
I think it's probably going to stay windows 7. I just use it to play music in my woodshop, and that it does!
I looked into it, but can't find a bios update anywhere.
I don't really need to install Linux on this box, but it's the first computer I've run across that won't take an install. I haven't tried any Linux distro outside of the Ubuntu based derivatives I had mentioned, may give that a go. I have one software program that runs on Windows 7, so If I try again, it will be a dual boot. I'll put in a second drive. The software I want to run (besides the music player) isn't real happy in WINE, or for that matter on various VM's I've tried. It's a real oddball situation.
Well, after using a Ventoy USB and choosing Linux MInt 21 and leaving it overnight, I came downstairs in the morning to find the live demo up and running. I played with it for a while, and decided to do the install. It installed just fine, and I've run the usual updates and things seem stable.