If you can use another PC, go here to download the Realtek driver for your nic, copy it to a flash drive, and then install it on the problem PC from there.
I went through this link and tried to install this, but in the installshield wizard it fails to download and says 'Realtek Network Controller was not found. If deep sleep mode is enabled please plug in the cableAccording to its support site, that MSI motherboard has a Realtek RTL8111H integrated gigabit ethernet device.
HERE is the direct download link for the Windows 10 64-bit driver (10.53.1001.2021) listed for it which was released about 2 months ago.
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