With Qubes OS, users can securely separate their online activities, such as browsing untrusted websites or doing online banking, into different qubes. This ensures that if one qube gets compromised, it won't affect the others. Qubes OS also offers protection against malicious email attachments by opening each attachment in its own disposable qube. Tens of thousands of users and companies rely on Qubes OS for their security needs. It is a free and open-source operating system that supports both Linux and Windows virtual environments, leveraging virtualization technology to create and manage these isolated compartments.