it's got a certificate signed by the bogus certificate authority that dell bundled. So if your browser accepts the certificate (eg shows a green https instead of preventing the page from loading and displaying a warning) then the CA is installed and trusted on your machine
It is signed by the eDellRoot certificate, if you visit the page and you don’t see any certificate warning, then your machine probably has the eDellRoot certificate installed.
If you don't get a big + scary "Invalid Cert, unsafe!, unsafe!" warning - you have the dell CA installed and trusted...