I had a LOT of negative things to say about Mircosoft lately (all about metro in Windows 8 which I think is horrible and has no place on a desktop without the choice to choose a a default) HOWEVER.....
When it comes to being proactive about security issues and not trying to hide the cold reality from users I give Microsoft an solid A +.
The reason why there are so many targets on Windows OS and IE is because they are the most used OS and browser around the world by leaps and bounds. So it figures that the criminals would target it most often.
Give credit where it is due. MS deserves a LOT of credit for being very relentless about improving security.
For the most part the only time there is trouble is when the first and best line of defense against malware FAILS. That first line of defense is the grey matter between our ears. If you are diligent about using care when using the internet it is very unlikely that you will ever encounter malware, and that is what security suites are for, that rare case of a well known website being hacked by a criminal with malware for instance, it isn't a common occurrence BUT it can happen.
I still don't understand why MS hasn't done an intensive ad campaign with OEMs to raise the visibility of USERS using care when online. It would also gain them a lot of credit that they should get but often don't receive.