Qubes OS
Qubes OS is a free and open-source, security-oriented operating system for single-user desktop computing. Qubes OS leverages Xen-based virtualization to allow for the creation and management of isolated compartments called qubes.
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Linux Lite
Linux Lite is a beginner-friendly Linux distribution based on Ubuntu's long-term support (LTS) release and featuring the Xfce desktop. Linux Lite primarily targets Windows users.