And you judge that by the comments that you read from Mac users who have very, very little experience with Windows.
I have lots of Windows experience, and it blows.
The problems came from the fact that Microsoft sought to continue its dominance of the desktop by dominating the Internet, but they had no idea of the levels of security that would be necessary. In order to capture market share, they rushed IE to market, made it capable of all kinds of things that were good but full of security holes. ActiveX actually let websites run applications on your computer. They rushed for market share, trounced Netscape, and started running the victory lap -- and then spent the next 10 years applying endless patches on software going back 17 years.
Sure, corporate IT can run it safely, with a few software firewalls, and lashing down each machine with policies so they can do just what the boss wants and nothing else. But the average Mom and Pop have to suddenly become experts in Malware, tie down their machines with expensive, speed-killing antivirus software, and end up with a zombie computer sending out spam as much as the chain e-mails they send to their friends.
Millions of zombie computers. Conservative estimate, 60 million. Security experts like Bruce Schneier say, don't do your banking on a Windows machine. Too many Trojans and keyloggers out there.
That's for starters.
What's that the result of? Windows went for market share. That makes them the largest attack surface in the world.