Unidentified Network - Ethernet

Jan 17, 2019
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So.... a few weeks ago my network suddenly didn't work. It was written Unidentified Network - No Internet connection. I've tried everything but it didn't work, so I bought a network pci card in order to fix the problem, and it did. BUT a few weeks later my ssd died and I bought a new one. Reinstalled Windows, and guess what, both the MB port and the network card don't work.

Sometimes the MB port is working for a few hours and then disconnecting again.

*Windows troubleshooter says: "Ethernet" doesn't have a valid IP configuration.
I've tried everything: from updating the driver to IPConfig Command Line Tool.
I'm sick of this problem...
Can anybody, please, help me?
 

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