Try resetting through cmd. If you have windows you can press ctrl + r which will bring up the run task. type cmd and follow the steps below. I already mentioned dave so for now this will be a quick fix.
1) Type "ipconfig /flushdns" and press Enter.
2) Type "ipconfig /registerdns" and press Enter.
3) Type "ipconfig /release" and press Enter.
4) Type "ipconfig /renew" and press Enter.
5) Type "netsh winsock reset" and press Enter.
6) Restart the computer.
7) Restart router.