Try ping to 8.8.8.8 from the Command Prompt window.

More likely that your host file was corrupted.

Try reset winsock with following command under Command Prompt window (Must run as Administrator).


If you have antivirus or security software installed, disable them or uninstall them. Sometime it could be due to antivirus/security software (3rd party firewall) corrupted files. I have experience with it before. After uninstall, it work perfectly fine then I install it back again. Usually it was corrupted due to update or malware.