Al recently upgraded to Windows 10 and Chrome has been giving him error messages preventing him to go to certain sites. Leo says to trust that. It's likely that the site has some malware code in it that will cause issues down the line. It could be a generic warning though. To be safe, Al shouldn't click on any links. Instead he should hover over it to see what the actual link is. It's possible to spoof a link with HTML code. In fact, Leo suggests turning off HTML in his email client. Leo suggests also using Thunderbird. It will give him the option of text only.