I'd agree with these findings.

Windows 7 especially does seem fairly safe and secure. The only time I've had a virus on my current computer is when I've actively downloaded files and run them without properly scanning them first (which is 100% my own fault of course; not a wise idea to download when rushing!)

I know some non-tech-savvy users who literally have 200+ programs installed and 3+ of those spammy toolbars on their IE installs. When you've got people who will download anything and everything they see, it's no surprise they get loads of viruses - and then blame Windows when thing go awry.

I agree that the architecture of Unix-based OSes is probably more secure than Windows 7 overall, although this doesn't mean that W7 is insecure.