There is no magic website that gives you a "Windows 10 Qcow2 Download Fixed" button with a single click. The fixed state is a process, not a file.
The status of a "fixed" Windows 10 Qcow2 download typically refers to official or community-sourced virtual disk images pre-configured for use in hypervisors like QEMU/KVM, Proxmox, or UTM. Availability and Official Status Windows 10 Qcow2 Download Fixed