Malware is a fact of life and you have to be proactive in defending yourself. Windows 7, if setup properly, will handle malware as good as any OS, including Apple's.
I defended myself proactively by buying a machine with Unix OS on it. That is, I got a Mac. . . .
There’s rarely a day that goes by that we don’t have a call to clean malware off of a Mac.
Your perception of Mac’s is about two years outdated.
The more popular Mac’s get the more attention they will attract from hackers.
The Cult of Mac is about to have an awakening.