Like previous versions of Windows, Windows 10 is able to detect Internet availability. When the Internet does not work, a yellow warning icon appears over the network icon in the taskbar. If you use a proxy server or connection filtering, it might be very annoying to see that overlay. Here is how to disable it.
Starting with Windows Vista, the operating system is able to show internet availability via an icon besides a network connection indicator. Windows can check if the internet is down and only the local network is available. If the Internet is not available, you will see a yellow warning icon over the default network icon in the taskbar. When the internet is working, you see only the network icon - either a wired or wireless one. If you are not happy to see this yellow overlay icon on top of the network icon, here's how you can disable it.