While the Windows Installer is a mature technology, version 5.9.300.6315 introduced several under-the-hood improvements that matter to system administrators:
Although MSI (Windows Installer) core updates are rare, incremental builds like this typically focus on: MSI 5.9.300.6315
Custom actions that register COM objects now experience fewer race conditions. This is particularly noticeable when installing complex applications like AutoCAD, SolidWorks, or Adobe Creative Cloud products. While the Windows Installer is a mature technology,