WinZip Self - Extractor 3.0 allows users to create self - extracting Zip files that can contain multiple compressed files, minimizing download time and ensuring that important files remain together. This software provides a familiar Windows interface for decompressing files without the need for a separate unzip utility. Additionally, it offers the option to run a setup or installation program after the files are decompressed, enhancing the user experience and streamlining the installation process.