MSEL

msel refers to the Microsoft Software Installer, a package manager for Windows. It is used to install, maintain, and uninstall software on Windows operating systems. MSEL packages are typically distributed as .msi files. The installer handles the process of copying files, creating registry entries, and configuring system settings necessary for an application to run.

The msel format replaced the older .exe installer technology in Windows 2000 and has been standard in subsequent versions of Windows. It provides a consistent and reliable way to deploy applications, ensuring that software is installed correctly and can be easily managed. Administrators can use msel packages for silent installations, allowing for automated deployment across multiple machines without user intervention.

When an msel package is executed, it follows the instructions within the .msi file. This includes determining prerequisites, user interface elements (if any), and the actions to be performed on the system. The installer also supports rollbacks, meaning if an installation fails, it can revert the system to its previous state, preventing incomplete or corrupted installations. Uninstalling software installed via msel is also a straightforward process, typically initiated through the "Add or Remove Programs" or "Apps & features" control panel.