Computer losing internet connection

I use a wireless 3G Verizon connection through a router and USB modem, rather than a jetpack. My Win 10 laptop always says there is no internet connection, and displays the little yellow triangle with exclamation point. In spite of that, the internet always works just fine. I have searched the web for an answer and found many ways to fix it, none of which work.

DW's Win 7 laptop recognizes the connection with no issues.

If I use my Verizon phone as a hotspot, Win 10 recognizes the connection.