- Right-click that Realtek Network Adapter entry in the device manager, and select "properties." Now click Roll Back Driver. Any luck? if not try next thing.
- OK Right-click that Realtek Network Adapter entry in the device manager, and select "uninstall." Click OK
- Can you please try downloading driver from here sometimes motherboard sites are old and outdated.
https://windows.microsoft.com/en-US/windows/help/network-connection-problems-in-windows?T1=tab02
https://windows.microsoft.com/en-US/windows7/How-do-I-fix-network-adapter-problems
https://windows.microsoft.com/en-US/windows/help/network-connection-problems-in-windows?T1=tab03
https://windows.microsoft.com/en-US/windows7/Using-the-Network-troubleshooter-in-Windows-7
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