I'm not sure how anyone could sell you such a thing. SSL is the protocol used by servers to encrypt information back and forth between a client a and the server, to prevent man-in-the-middle attacks (which means that a person sniffing the packets you are sending to the server won't be able to see the actual information, only random data generated by the encryption software). I'm not sure "how being hacked into" and "SSL security software" correlate. I have never even heard of such software.
What exactly are you experiencing, other than not being able to connect to an insecure network? Have you tried scanning your device using alternative applications? Most of what Dan said is unrelated, but if you are concerned about being infected, you could try scanning with MBAM.
Anyways, Windows Defender is good enough for a normal, sensible human (https://www.av-test.org/en/antivirus/home-windows/