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.