Recently saw a situation where a user running Windows 10 was doing just fine until he installed Microsoft Office. I have no idea what Microsoft was thinking on this one. But what they did was reset a number of security settings on this system to paranoid/delusional. As well as changing their private to a public network. Which this combination of settings refused to allow the user to goto legitimate websites and do things online that they previously were able to do. Resetting the settings back to defaults in this case seemed to take care of the problem. One of the sites in question was www.dickblick.com – No, not a porn site….its an art supply company in fact.