If you are looking for this specific version for archival or legacy system testing purposes:

While there is no official "Skype 407" version, search results suggest this likely refers to , a release from 2009–2012 primarily used on Windows and early Linux distributions. Important Status Note

: While the official site now redirects to Teams, you can occasionally find historical versions on third-party software archives like Uptodown or OldApps.

: These are typically provided as .exe installers for Windows or .deb files for Linux, though some third-party sites may wrap them in a .zip archive for easier downloading. Skype 4.0 for Windows: Significant Overhaul - Datamation

: Version 4.0 represented a major redesign that focused on full-screen video calling and a revamped user interface.

As of , Microsoft has officially retired the Skype service . Most functionalities have been migrated to Microsoft Teams , and older versions (like 4.0.0.7) are no longer supported and generally cannot connect to the modern network. Skype 4.0.0.7 Historical Details