. Because Microsoft ended support for Windows 8.1 in January 2023, DuckDuckGo has not released a version compatible with that operating system. DuckDuckGo Additionally, the official browser is distributed as an appinstaller MSIXbundle
The DuckDuckGo Private Browser for Desktop (Windows) was officially released in 2022. The system requirements specify: duckduckgo browser download for windows 81 portable
Run the installer and choose "Portable" mode. Select your USB drive or a local folder. duckduckgo browser download for windows 81 portable