SQL Server 2005 is not officially supported on Windows 10 or Windows 11. Attempting to install it on these systems often results in "Performance Counter" errors or service start failures.
While the full ISO is restricted, Microsoft still hosts some secondary components, such as the SQL Server 2005 Compact Edition and Management Studio Express . Installation Prerequisites for 64-bit Systems
If your organization maintains a legacy subscription, you can often find original ISOs for SQL Server 2005 Standard (x64) in the "Downloads" section of the Visual Studio Portal .
Downloading requires navigating legacy software archives, as Microsoft officially ended extended support for this version on April 12, 2016 . While it is no longer available via standard modern download pages, it remains a critical requirement for maintaining legacy business systems that cannot yet be migrated. Where to Download the 64-bit ISO
You must install .NET Framework 2.0 (64-bit) before starting the SQL setup.
Windows Installer 3.1 or higher is required.