We have been encountering the same problems with Chrome on some Microsoft sites, especially on Windows Store and Xbox Store URL links. Instead of showing those pages, we got an "This site can't be reached" error.
Just clear our the cookies in the Chrome browser, and the Microsoft sites that were not coming up should return. If you are using Chrome and are encountering these issues, here's how to clear the browser of its cookies. Be aware this will also purge the browser of all your stored passwords