SQL Server 2005 was supported by Microsoft until April 2016, when it reached its end-of-life. This meant that Microsoft no longer provided security updates, technical support, or bug fixes for SQL Server 2005.
SQL Server 2005 (internally version 9.0, codenamed "Yukon") was a landmark release that fundamentally reshaped the Microsoft data platform. While it reached its end of support on , it remains a critical component for many legacy environments and specific archival systems. Core Features of SQL Server 2005
If you must maintain an application that requires SQL Server 2005:
The full ISO (International Organization for Standardization) for SQL Server 2005 refers to the complete installation media for the product. The ISO file contains all the necessary files to install SQL Server 2005 on a server, including the installation program, documentation, and tools.