How to remove that yellow exclamation mark from my LAN connection notifier?

I'm using a Lenovo G510 notebook. It has a Qualcomm Atheros AR8172 ethernet controller. Recently, I updated to windows 8.1. As my college provides a proxy server, I had to exempt the windows apps using appcontroller loopback and use ccproxy to use the windows store for downloading the 8.1 update. But after updating, the LAN notifier started showing the yellow exclamation mark even though my net is working as I type this. But the taskbar notifier says no internet access. I've already tried ipconfig /all and flushdns. I've also installed the driver for win8.1 after uninstalling it. I tried exempting and changing the regedit like before. I tried configuring the ipv4 switching it from dhcp to static back and forth.

But the yellow sign won't go and thus the windows store won't open. Not only windows store, the other apps like travel and mail are also not working. What should I do to reopen my apps over proxy like before?

Your Proxy will have an address or it will be assigned to DHCP, Please make sure your are setup with automitic ip address and DNS settings and check if any proxy address given in lan with the systems which are working fine.

Check for errors
it is a sign of error
whether you have limited internet access or networking problem
have a troubleshoot for this