Did you do a clean installation or did you upgrade your Windows 7 or 8 installation? If it's saying you have no internet connection, it sounds like it doesn't recognize your network adapter. Do you connect to the internet via wi-fi or with a network cable? Go into Device Manager and verify that your network adapter is detected and working properly. If you are using wi-fi, just make sure that your PC is connecting to your wireless network. You may just need to reenter your wi-fi password to connect it.