I have a laptop that consistently has a problem when it accesses a site online. Each and every time I get the same message from the site I am visiting. The message is strange and I have no knowledge of how to correct the implied problem.
The message is: “There is a problem with this website’s security certificate. The security certificate presented by this website has expired or is not yet valid.”
This message appears when I try to access my email account.
The problem is most likely not yours to correct. More often than not, it’s a problem with the website itself.
You still need to be careful, though.
Let’s look at security certificates on https connections: what they mean and what you should do when faced with messages such as this.