82574l gigabit network connection
Latest package is available here: https://downloadcenter.intel.com/download/26092/Ethernet-Intel-Network-Adapter-Driver-for-Windows-Se.... I am not seeing the 82574L mentioned as supported or specifically unsupported. All you can do is try it...
Hope this helps,
Not sure what to suggest. This PHY is just too old, I guess (from 2008 - and just discontinued in Q1'20). You can always add an interface via PCIe card or USB.