Indicates the ISO contains both 64-bit (x64) and 32-bit (x86) versions of the operating system.
The string likely refers to a custom-built Windows Vista Service Pack 2 (SP2) disk image (ISO) that has been pre-patched and integrated with recovery tools . This specific naming convention is typical of enthusiast-made "All-In-One" (AIO) installers found on archival or community forums. Key Components of the Build Windows viso sp2 x64 x86 en us dart8 final feb2017
This was the final major service pack for Vista, released in 2009. It included all previously released security updates and performance improvements. Indicates the ISO contains both 64-bit (x64) and