Η Microsoft just released the official version of the guide learningof Windows 8.1, trying to help her customers who are looking for more information about the new features of its new operating system.
The guide is in PDF format.
The Windows 8.1 Product Guide will guide you through the many new and enhanced features of Windows 8.1 and Windows RT 8.1. ” says Microsoft.
Of course, the PDF document is offered free and includes information about all versions of Windows 8.1.
You can download it here.