Affiliate Marketing Secrets

I am pretty upset, I start up my computer and it has this Hamachi crap that I never even knew I installed, and it’s so intrusive that it won’t let me uninstall it (easily, at least). I have no idea how to do this and am not very skilled with computers, so if someone could give me a kind of “How to Permanently Uninstall Hamachi and All its Components/Affiliates: For Dummies” I would be much obliged.
Thanks. Please, be as specific as possible.