I'm not exactly Microsoft's biggest fan, and their software could undoubtedly be improved. On the other hand, they're currently the biggest. You could bet that if someone else wrote better operating systems and managed to bite off the biggest market share, then they'd automatically also become the biggest target for malicious attacks of the digital variety. In an ideal world, doors wouldn't need locks. Sometimes I'd really like to be able to opt out of the human race. :(