Hello, Pontus Selin
Welcome to the Microsoft Community.
Hello, thank you for your feedback here on your issue, it seems that you are experiencing a situation where the NIC driver has not been recognized properly.
First of all, thank you for your latest update progress, you have tried many methods, I appreciate the effort you have put in, it shows that you must be a scholar with a spirit of research.
It seems that your NIC is working normally at the moment, I have some information to share with you as to the cause of this problem, I have encountered a similar situation to yours before, I also tried many methods and still kept dropping the NIC driver and it was unrecognized, and finally did solve it by uninstalling and installing the driver many times, but after a while my NIC driver seemed to be completely unusable, and checking it revealed that there was a hardware The problem was a hardware issue.
So if you have the means, you can try replacing the card with a different one or using usb network sharing to see if the driver is still often unrecognized, or maybe you need to consider a hardware problem.
Best regards
Bobhe | Microsoft Community Support Specialist