Not only did I have to remove the certificate from my root authority in the control panel, I also had to remove it from my list of certificates in Firefox. This was after uninstalling Superfish. Once I did all of these things, and cleared my history and cache and all that, the website that folks have been linking said that it didn't detect Superfish (sorry, I'm typing this from a phone).

So my explanation wasn't very technical, but I feel as though the part of the process where you also remove the certificate from Firefox had been left out, and I wanted to share it in case it helps out another person.

This news took me by surprise, as I just received a brand new Lenovo Yoga 2 for work last week, and it had this vulnerability.