In order to root out one of the more common issues, we'll need to see your hosts file. Here's the steps to getting this file.
1) Press the Win + R key on your keyboard.
2) Paste the following into the prompt that opens: 'notepad %windir%\system32\drivers\etc\hosts'
3) Use Ctrl+A to select everything in the file, then Ctrl+C into the textbox to post to this thread.