Whether you are a retro gamer, a legacy app developer, or a security researcher, running Windows 7 in a virtual environment requires the right disk format. The QCOW2 (QEMU Copy-On-Write) format is the industry standard for Proxmox, KVM, and QEMU users because it offers thin provisioning and snapshot support.

The best Windows 7 QCOW2 image is the one you build yourself. Why? Full control over: