I have 3 HP laptops for my kids. All same models, core i3, running windows 10. Each one works great for a few weeks, then at some point get the little yellow warning on the wifi symbol, and if you hover over it, the message unidentified network no internet access. If I go in properties, the IP address the laptop shows to have looks like something from the ISP (charter) not my network. I have been fixing this by going into the network properties and if the dns is automatic, change it to static. If it's static, change it to automatic. This seems to make the laptop clear out all settings and reconnect to the network.

And the router and AP are araknis.