Since I built my PC, the network icon in Windows has always displayed as if there were no internet connection, despite there being an active connection to the internet.
I've tried uninstalling the Ethernet device driver and installing the latest version, but that did not help. I've disabled all unused network adapters. I've also tried clearing the tray icon cache using the method detailed here: https://www.sevenforums.com/tutorials/13102-notification-area-icons-reset.html. Unfortunately the issue still persists. I'm not sure what to try next.
I was reading this article: http://blog.superuser.com/2011/05/16/windows-7-network-awareness/ and am thinking the issue might be linked to NCSI in Windows, but am not sure how to troubleshoot if this is the case.