"If you take a normal Windows PC and connect to the Internet, you will be infected in 10 minutes (without protection)," Mikko Hypponen, Anti-Virus research director at Finnish data security firm F-Secure (FSC1V.HE), told Reuters.
(This is more directed at companies—especially large ones like mine—than consumers):
At some point, you have to stop blaming Microsoft and blame the people who keep buying their products. How many more times will it take? How much more lost money?
Update: The weapons industry has been dealing with the issue of who to blame for quite some time—with a mixed set of results. Maybe there should be a mandatory background check and waiting period for all Windows purchases?