What is this?!

Okay, so I have a laptop that I’m borrowing from a friend and I am connected to the Internet, but when I try to view sites like Google.com, Yahoo.com or Gmail.com, I get a page that comes up that says “Plesk Default Page”…does anyone know what this is? It’s very very frustrating. When I go to gmail.com, I get a prompt about a security certificate and I accept it, but I still go to the “Plesk Default Page”…Hopefully someone has the solution!! I’m hoping it’s just a security issue that I can fix in my settings.

Thanks in advance.