The "viso" is likely a typo or shorthand for Vista , Microsoft's operating system released in 2007.

Indicates the ISO contains both 64-bit (x64) and 32-bit (x86) versions of the operating system.

Refers to the Microsoft Diagnostics and Recovery Toolset (DaRT) version 8. This is a collection of recovery tools that helps administrators repair unbootable computers and recover data.

This marks the build's update cutoff. Microsoft officially ended extended support for Windows Vista on April 11, 2017 . A "Feb 2017" build suggests the image was finalized just before support ended, likely containing almost every security patch released for the OS. Technical Context

The language for this specific installation is English (United States) .

This was the final major service pack for Vista, released in 2009. It included all previously released security updates and performance improvements.