Microsoft no longer distributes VS 2010 directly. It is considered abandonware. If you require it for legacy project maintenance, ensure you obtain it from a verified archival source (e.g., Microsoft Visual Studio Older Downloads page with a valid subscription, or the Internet Archive) and apply an appropriate license key.
(formerly MSDN), you can still download the ISO for Visual Studio 2010 Ultimate from My.VisualStudio.com Microsoft Learn Community Archives (Use with Caution) microsoft visual studio 2010 ultimate free download
Released in April 2010, Visual Studio 2010 marked an important step in IDE design by providing richer tooling for large-scale application development and team-based workflows. The introduction of the new WPF-based shell improved the visual experience and extensibility, while IntelliTrace represented a notable advance in debugging technology. For many enterprise teams, Visual Studio 2010 Ultimate became a standard tool for building complex .NET and native applications during the early 2010s. Note: Microsoft no longer distributes VS 2010 directly