djlastword

Thanks for your detailed response!
Quick follow up, are using saying that Windows Defender in Windows 8 is not an anti-malware product in the same sense as yours or other companies' like Kaspersky and Symantec? Or are you saying that it has similar functionality but of a lesser quality?

I'm a somewhat experienced home user. I keep my computers updated, use a firewall with default settings, keep cloud-backups of my important stuff, don't click shady links, open spam or download weird stuff etc.
Is there any real reason for me to invest in a separate anti-malware software if I'm on, either a PC running Windows 8, with the built-in anti-malware operating, or a Mac?

Really? I always imagined that would just be in the way.

Cool, I'll check out Malwarebytes! Thank you so much