Your Dad is more than likely right in saying its a scam.
I've had many home users duped by some of these pop-ups before, you go to thier site, download their "free" software, run a scan and come back with about 100 or more "infections".
Panicing now that your current AV didn't pick these up, you send cash to these guys and you're not any better off, in fact you could be worse.
Ignore those pop-ups or block them if you can and stick with an established AV company that you trust would be my answer.

Proud Sony Rear Admiral







