Millenium.exe -

: Adds new features through community-developed plugins. Examples include:

: Install custom CSS-based themes to change the visual appearance of the Steam library, friends list, and store. MILLENIUM.exe

: While the operating system itself is not a single .exe , many legacy installers or system tools related to this 2000-era OS are labeled with "Millennium". It was famously known for its stability issues and as the last of the MS-DOS-based Windows versions. : Adds new features through community-developed plugins