Why I can't connect to the Internet on my pc

How to solve can't I connect to the Internet?

Internet connection problems are most commonly caused by disconnected cables or by routers and modems that aren't working correctly. First, try running the Network troubleshooter to see if it can diagnose and fix the problem. if didn’t work here are some tips below

My connection is limited:

 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.

I can’t connect to the internet through a dial up connection or I’m being disconnected:

         i.             

        ii.            Make sure you're dialing the correct number, including any required access numbers (such as 9), and that the number isn't busy.

      iii.            Make sure the phone jack is working. To test this, plug in a phone to see if there is a dial tone.

      iv.            Make sure the phone cable is plugged into the "line" jack on your modem, not the "telephone" jack.

       v.            Make sure the phone cable isn't defective by plugging a phone into the "telephone" jack on your modem. If there's a dial tone, the phone cable is working.

      vi.            If you have call waiting, try turning it off, and then try connecting again.

    vii.            Your ISP might have disconnected you if you weren't interacting with the website for a while. Try connecting again.

   viii.            If someone picked up the phone while you were online, you might have been automatically disconnected. Try connecting again.

      ix.            Most dial-up modems work only with analog phone lines. Verify that you have analog phone lines installed, or, if you have digital phone lines installed, verify that your PC has a digital modem.

       x.            Make sure your modem is working properly. For more info, check the info that came with your modem or go to the manufacturer's website.

      xi.            Contact your telephone company to verify the quality of your phone line.

    xii.            If your PC has two network connections, the networking software must choose which connection to use for network traffic. The networking software picks the connection with the best performance. For example, if connection A has Internet connectivity but slow performance, and connection B has no Internet connectivity but better local network performance, the networking software will route network traffic over connection B. This means that you won't be able to view websites, so Windows will report that you only have local connectivity (no Internet). Technically, this is correct, but it's not what you want. To force your PC to use connection A—the connection with Internet connectivity—disconnect connection B and try again.