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It could be that your computer has IPv6 selected. Try disconnecting it as follows:
In the search field type.ncpa.cpl and press enter.
In the new window right click on your wireless network connection and select properties
In “This connection uses the following items” section remove the tick beside Internet Protocol Version 6 (TCP/IPv6) then press OK
Left click on Internet Protocol IPv4, click properties . Check the options to obtain IP address and DNS server address automatically.
Once done try and connect to internet.
Have you checked the firewall settings on AVG.
Uninstall BTDesktop Help then try and connect.
It's quite possibly BT Desktop help that is causing the problem. Un-install it and see if that helps, you don't need it.
What make and model of computer?
Are you connecting by wireless or wired?
Have you checked that the Network card drivers are up to date? Use the manufacturer's website to check and not Windows which can be out of date.
If you still have a problem try starting your computer in safe mode with networking to see if it connects. That should rule out any software issues on the computer.
Are you sure you haven't blocked your laptop in the Hub? If you factory reset it by pressing in the recessed button until the lights flash it will clear any configs you might have made.