Unable to load up Wikipedia, in Opera, IE and Chrome. However, it loads up no problem in Pale Moon (Firefox variant)
This problem has been plaquing me since I did a clean install of Win 7, 31 days ago. Most updates are installed except ones that is rolled back after installing.
Opera Plugins: Ghostery and HTTPS everywhere.
Your connection is not private
This server could not prove that it is en.wikipedia.org; its security certificate is not trusted by your computer's operating system. This may be caused by a misconfiguration or an attacker intercepting your connection.
You cannot proceed because the website operator has requested heightened security for this domain.