The 2011 build represents the last stable, feature-complete version before Windows 8 changed the installation paradigm (UEFI/Secure Boot). The Spanish ISO, in particular, was curated by the (Testing Zone) and TodoWindows communities, packing essential software localized for Latin American and Spanish users.
Beyond software, it can automatically apply system optimizations and configuration changes to the Windows registry. Historical Significance and Modern Usage windows post install wpi 2011 spanish iso download updated