Hmmmm,

Is there anyway I can call eblaster and scream at them about it/threaten legal action?
Not really, well certainly not in the EU, as it was your father who installed it, rather than the application vendors. I would hazard a guess that US and Canadian legislation is similar?

I think that Shay is spot on with his recommendation to wipe the machine and do a clean install of the OS. That is pretty much industry standard practice for dealing with malware infections, and to you, that application is certainly malware.