This column is written for mainstream, nontechie users of digital technology. These folks aren't necessarily novices, and they aren't afraid of computers. They also aren't stupid. They simply want their digital products to operate as promised, with as little maintenance and hassle as possible.

So, I have steered away from recommending Linux, the free computer operating system that is the darling of many techies and IT managers, and a challenger to Microsoft's dominant Windows and Apple's resurgent Macintosh operating system,...