Go to your hosts file and uncomment the "127.0.0.1 localhost" part. I was having the same issue and this fixed it. The hosts file is located in C:\Windows\System32\drivers\etc\hosts. To edit the hosts file, right-click on Notepad and run as administrator. Then open the hosts file and remove the # character in front of "# 127.0.0.1 localhost" part and save the file.