I use the Windows 10 mail app for my emails. It works fine until I try to click on a link. At this point, I get the message pop of on "Unable to open [link adress]". I have looked at other people who have had this problem and the solution was that their Windows Firewall was deactivated, mine is not. It seems that not many people have had this problem and if they did it was resolved by activating their Windows Firewall, as I stated before; since this is not the root of my problem, if you have any other solutions I'd be happy to try them out.