The most legitimate way to get the files is to download the full Visual Studio 2010 SP1 ISO and extract it. The .msi file you are looking for will be buried inside.
The vs10sp1-x86.msi service pack includes: vs10sp1-x86.msi offline download
The file is legal to download if you own a legitimate license for Visual Studio 2010 or are installing a Microsoft-provided redistributable package. The most legitimate way to get the files
Since Visual Studio 2010 is an older software suite, modern reviews focus on its legacy utility and installation quirks: Reliability: Since Visual Studio 2010 is an older software
Once the installer finishes, verify the version in Visual Studio: Open Visual Studio 2010. Go to > About Microsoft Visual Studio . The version should now reflect Version 10.0.40219.1 SP1Rel .
Since Microsoft does not provide a direct "Download vs10sp1-x86.msi" button, you have to use one of the following methods to get the files.