Because Microsoft has ended extended support for Visual Studio 2010, obtaining installation media has become difficult. Furthermore, the original web-based bootstrapper downloads are often defunct or impractical for secure, air-gapped (offline) networks. This paper outlines the methodology for acquiring the offline installer, verifying file integrity, and executing the installation.
Because official public links are offline, many developers turn to digital preservation sites. Internet Archive : You can find the Visual Studio 2010 SP1 ISO
The most reliable method to obtain the offline installer is via the Microsoft Visual Studio Subscriber Portal (formerly MSDN) if your organization holds a legacy license, or through the archived Microsoft Download Center entries.