Microsoft believes the latest version of its Windows operating system is off to a great start, but it's going to take more than that to prove the revamped software will win over enough people to revive the slumping personal computer market.
Microsoft CEO Steve Ballmer can't afford to be wrong about Windows 8.

Microsoft CEO Steve Ballmer can't afford to be wrong about Windows 8. On Thursday in New York, Microsoft unveiled a dramatic overhaul of its ubiquitous Windows operating system. It will go on sale Friday, fused into more than 1,000 PCs and other devices. If it flops, the failure will reinforce perceptions that Microsoft is falling behind competitors such as Apple, Google and Amazon.
Microsoft CEO Steve Ballmer can't afford to be wrong about Windows 8.