Windows 10 19H1 on a 2003 era Athlon 64 3200+
Windows 10 x86 in one of the first Athlon 64s ever released, Athlon 64 3200+ (
ADA3200AEP5AP, Clawhammer) reased around September 2003 making one of the earliest CPUs able to boot Windows 10, due to lack of certain instructions, it can't boot the 64 bit version of Windows 10 (and 8.1), Windows 10 since 1607 doesn't support AGP so Radeons will pretty much not work and nvidia will run on PCI mode, there was a workaround for that, but i couldn't get it working
Machine specs:
AMD Athlon 64 3200+ (130 nm, rev C0, Clawhammer, 2.0 GHz, 1 MB L2)
Foxconn K8S755A
3 GB DDR
nVidia Geforce 7300 GT AGP
40 GB Maxtor DiamondMax Plus 8 IDE (test drive)