Is it a network card?

Question

Iron

Good evening,
There is a problem with the stability of my connection on the pc. Once every 2-3 hours, the Internet is simply cut off, i.e. network status is shown with a red cross.
The PC is connected to the router, and 5 more devices are connected to it. The problem only occurs on mine. There are no gaps on the part of the provider. Driver and windows reinstalled. Sometimes breaks don't happen all day, sometimes every hour.
What could be the problem?