Access to a site (wikipedia) blocked because the website uses HSTS

(1.) When I try to connect to www.wikipedia.org through Chrome, I get a message that the site uses HSTS encryption and so, I cannot access it. I have attached a pic of the full message to this email. I was wondering what I could do to exempt this site from being checked by Norton 360. I am using Windows 7 and Chrome. The block occurs on Internet Explorer as well. 

(2.) Another problem I have is that I was using Windows 10 previously and through some problem that occurred, I lost all my information including Windows 10. When I tried to download Windows 10, I was prevented from doing so by (I believe) Norton 360 and so, I reverted to Windows 7. I would like to go back to Windows 10, if possible. 

I would be grateful for your advice.

Thank you.