Update the LAN driver specifically from Realtek.
Because this motherboard relies on an Intel chipset, many core functionalities depend directly on Intel's generic drivers, while specific audio, network, and system monitoring features rely on third-party hardware component vendors (like Realtek or VIA). Essential Drivers for Samsung H61S1 samsung h61s1 motherboard drivers
The is a micro-ATX motherboard built on the Intel H61 chipset . Since this board is often a "surplus" or OEM part (frequently from Korean markets), finding a dedicated official Samsung support page can be difficult. Update the LAN driver specifically from Realtek