Next week, Microsoft is releasing Windows 7, a slick, much improved operating system that should go a long way toward erasing the bad impression left by its previous effort, Vista. If you’ve been holding off on buying a new computer, Windows 7 will be a good excuse to get back into the game. If you’ve been weighing a Mac versus a Windows PC, then you should know that “7” makes Windows more attractive, though not a clear-cut choice for everyone. Windows is now easier to use and better looking than it was before, while maintaining its core advantage of cheaper, more diverse hardware.