This means the PC has successfully connected to the router, but the PC wasn't assigned a valid IP address, so you can't actually get to the Internet. It can also indicate that a valid IP address was assigned but that the PC doesn't have Internet connectivity. If you're connected to a home network, try restarting the router. If you’re connected to a domain network or a public network, contact technical support for that network.
Note
PCs running Windows RT 8.1 or Windows 8.1 can't join a domain. You can only join a domain if your PC is running Windows 8.1 Pro or Windows 8.1 Enterprise