qemu-system-x86_64 -m 4096 -smp cpus=2 \ -enable-kvm -cpu host \ -drive file=windows81.qcow2,if=virtio,format=qcow2,index=0 \ -cdrom /path/to/windows81.iso \ -drive file=/path/to/virtio-win.iso,media=cdrom,index=2 \ -net nic,model=virtio -net user \ -vga qxl -boot d Use code with caution.
virt-install \ --name win81 \ --ram 4096 \ --vcpus 2 \ --disk path=windows81.qcow2,format=qcow2 \ --cdrom /path/to/Windows_8.1.iso \ --disk path=virtio-win.iso,device=cdrom \ --os-variant win8.1 \ --graphics spice \ --network network=default,model=virtio
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The installer will load the virtual interface. Your QCOW2 space will immediately display as unallocated space. Select it and click to proceed with the normal file expansion and installation. Step 5: Post-Installation Infrastructure Setup
Windows 8.1 is designed for UEFI systems. While it can run in Legacy BIOS mode, UEFI is recommended for GPT partition schemes and Secure Boot capabilities. QEMU requires the OVMF (Open Virtual Machine Firmware) package. qemu-system-x86_64 -m 4096 -smp cpus=2 \ -enable-kvm -cpu
If you are running Proxmox, you cannot simply drop the file into a folder; you must native-import it into the cluster storage configuration.
Which are you using? (Proxmox, pure QEMU, or Unraid?) If you share with third parties, their policies apply
Virtualization allows you to run legacy operating systems safely isolated from your main machine. While Windows 8.1 reached its official end of support, it remains a highly efficient, lightweight operating system ideal for testing software, running legacy applications, or experimenting with kernel-level modifications.
Ultimate Guide to Installing Windows 8.1 from a QCOW2 Image Using a pre-configured QCOW2 (QEMU Copy-on-Write) image is the fastest way to deploy Windows 8.1 in a virtualised environment. Whether you are using Proxmox VE, KVM/QEMU on Ubuntu, or Unraid, skipping the tedious OS installation wizard saves massive amounts of time.