Why does the Internet disappear on my home network?

Question

Computer networks

Good afternoon, I have been suffering for a long time, please help me with advice. The problem is this.
Home Internet, one router, 2 PCs via cable, and a laptop via Wi-Fi. The laptop and one PC work fine, but for some reason mine periodically disconnects from the Internet and a yellow triangle appears, if you look at the status at this time, it receives invalid dns ip and so on. Sometimes it helps to disconnect the adapter and connect it, if this does not help, you need to restart the router.
Friends said the problem was in the network, I changed the network, the problem remained.
I read that firewood is possible, updated the problem remained.
Reinstalled windows, still the same.
I thought due to the fact that IP addresses are registered and dhcp is disabled, I turned on automatic, everything is as before.
I thought maybe due to the fact that ports are open on my PC, I closed it, nothing helped.
Swapped the cable on the router, did not help.
What else can you advise? On other computers, there is no such thing, only my mystic.