Kubuntu is an official flavour of the Ubuntu operating system which uses the KDE Plasma Desktop instead of the Unity graphical environment. Developed by Canonical Ltd
License: Open Source
Kubuntu is an open-source Linux distribution known for its flexibility and performance, particularly on older hardware, while Windows 7 is a well-established OS with extensive software compatibility and user-friendly interface but is no longer supported. The choice between the two largely depends on user needs, technical expertise, and specific use cases.