Qubes OS: Security Through Compartmentalization
Qubes OS takes a fundamentally different approach to security: instead of trying to fix all bugs, it assumes software will be compromised and uses hardware-enforced isolation to contain damage.
Architecture
Every application runs in a separate Xen virtual machine (qube). Your banking browser, darknet browser, work documents, and personal files each live in isolated VMs. A compromised qube cannot access data in other qubes. The dom0 administrative domain has no network access.
Whonix Integration
Qubes includes Whonix integration: a sys-whonix gateway qube routes traffic through Tor for any connected qube. You can have multiple Whonix workstations with separate Tor circuits. This is the most secure desktop setup currently available for darknet use.
Hardware Requirements
Qubes needs: 16GB+ RAM (32GB recommended), Intel VT-x/VT-d or AMD-V/IOMMU, SSD storage, and compatible hardware (check the HCL). Older Thinkpad models (X230, T430) are popular choices with verified compatibility and the ability to flash Coreboot firmware.