It's a "why the hell did you install that software" issue, not a Windows issue.
That's BS, man. I was trying to install Beer Tools Pro and it wanted me to install some type of zip opener. Yeah, it probably wasn't BTP fault but it sure looked like I needed it to instal the software to un-zip BTP.
I can assure you that security problems like this DO NOT EXIST on the Mac. I have NEVER had a problem with ad-malware taking over my computer on ANY Mac I EVER owned. Period. End of story.
OK, let's back this up a bit...first, I'm sorry to hear about your problems. I know it can happen. But to explain my position, let me tell you I have been using PCs since 1982. I've also used Apples machines for about that long. In all that time I have gotten exactly one virus on a PC, about 20 years ago. I eradicated it quickly and easily. I have also seen friends who have Macs get malware on their machines. No, it doesn't happen often, but it does happen. About as often as I've had a virus on my PC.
So, sorry to hear about your problems. I hope some of the suggestions here help you. In the future, I know you'll be more aware of this and hopefully not d/l anything you aren't certain about.
BTW, Windows has zip/unzip software built into it.