Try this.

Go into the Avast GUI. Select Real Time Shields. Then Web Shield, then Expert Settings. Place a checkmark in the Scan traffic from well-known browsers only. Leave the checkmark for Enable Web Scanning in place. Click on the OK button button.

Then shut down the Avast GUI and reboot your PC. After the boot completes. the yellow icon in the Network Connectivity icon on the lower task bar should be gone.

Now try to connect to the Internet.

I told Avast about this issue in the 6.0.1289 release and they never fixed it. Only applies to WIN 7 as far as I am aware off. Don’t know if they fixed it in the new version. I will have to test that.