The win10 system frequently disconnects from the network and displays that the default gateway is unavailable.

Go to the official website to download the driver version 17.2.0.2

Right-click the Microsoft logo in the lower left corner and click "Device Manager"

Find "Network Adapter" in the Device Manager window, right-click and select Broadcom...Gigabit Ethernet, click "Update Driver"

Select Browse computer to Find the driver software, then select "Choose from your computer's driver"

##Click "Have Disk", select Browse and find Download the unzipped driver location, my 64-bit system, so select X64, double-click the b57nd60a.inf file

Select NetLink NetXtreme 57xx Gigabit Controller in the driver list and double-click until Display installation completed

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