I'm using a Gigabyte AX370A motherboard with an integrated Intel GbE LAN with Windows 10 64 bit.
The adapter works, but its appears in the system tray as a removable device. Its also listed under 'Unspecified' in the Devices and Printers page. I installed the drivers for it from Gigabyte's site first, then tried the latest release directly from Intel - no change.
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Any changes done in the system prior to encountering this concern? Looking at the specs of your motherboard, it also comes with Realtek LAN. Does it also show up in the system tray as removable device?
LAN components usually appears under "Network adapters" section of Device manager. I'd suggest checking with Gigabyte support to know if other similar motherboard owner also encounters the same issue and possible workaround.
This is a brand new system that has done this since the beginning. There is a Rivet Killer Networks LAN and the Intel LAN, not Realtek. The Killer LAN does not show as a removable device.
I spoke to one other person with this motherboard and he said the same thing, that the Intel LAN is a Removable Device in Windows.