Installing Windows 8.1 using a (QEMU Copy-On-Write) disk image is a popular choice for users running Linux-based virtualization like KVM/QEMU or Proxmox . This format is highly efficient because it starts small and grows only as data is added.
Some cloud providers and open-source projects offer ready-to-run QCOW2 images for legal evaluation. The most official source is (Windows 8.1 VMs for browser testing). However, those are usually in VHDX or VMDK format—convertible to QCOW2. windows 81 qcow2 install
This is the most reliable method. We create a blank QCOW2 file and boot the Windows ISO. Installing Windows 8