windows 8.1 versiones

http://en.wikipedia.org/wiki/Windows_8_editions#Comparison_chart
http://www.microsoft.com/es-es/windows/enterprise/products-and-technologies/windows-8-1/compare/default.aspx
http://www.dummies.com/how-to/content/the-5-versions-of-windows-810.html

Requisitos del sistema
http://windows.microsoft.com/es-es/windows-8/system-requirements