Microsoft SQL Server 2005 Standard Edition is no longer officially available for direct download from the Microsoft Download Center as support for this product ended on April 12, 2016 Microsoft Learn Current Status and Official Alternatives Because SQL Server 2005 has reached its End of Life (EOL)
Microsoft has made SQL Server 2005 available on the Internet Archive, a digital library that provides access to historical software and files. You can download the 64-bit ISO file from the following link: download sql server 2005 standard edition 64-bit iso
for the full "Standard" and "Enterprise" ISOs have been removed from the public Microsoft Download Center. Technical support from Microsoft is no longer available for this version. Where to Find the 64-bit ISO Microsoft SQL Server 2005 Standard Edition is no
Because official public links are offline, users typically rely on these alternatives: Where to Find the 64-bit ISO Because official
Believe it or not, the 32-bit (x86) ISO of SQL Server 2005 Standard will install and run perfectly on a 64-bit version of Windows Server (2008 R2 or older). It will run under Windows on Windows 64 (WOW64).