"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."
Set the correct date and time and check. Follow the steps to set the date and time:a. Press Windows key + C on your keyboard to show the Charms bar. b. Type “Date and Time” in the charms bar search. c. Click Change date and time button. d. Click Apply and Ok to save the date and time.