Update October 10--
Just a recap--both machines, originally owned by my friend's late husband, had been completely wiped, then were given to me. One has better hardware than the other.
The 2 computers in question are now living in my apt. The better one, which probably had Win 10, has NO Windows label, brand name or model # label, so maybe it was custom built by the owner. There's a 3x3" clear panel on one of the sides, why doesn't sound especially commercial. . It has a tiny HD, about the size of a laptop HD, so would that be an SSD? I have to hook it up to get all the UEFI stats.

