Windows 81 Qcow2 Install «720p»

The first step is to create the virtual hard disk. Open a terminal and use the qemu-img command.

qemu-img create -f qcow2 win81-disk.qcow2 60G

There are two legitimate routes:

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. windows 81 qcow2 install

Ensure OVMF is installed (e.g., sudo apt install ovmf on Debian/Ubuntu). You typically need to point QEMU to the OVMF_CODE.fd and OVMF_VARS.fd files.

Issue: The "Black Screen of Death" on Boot. The first step is to create the virtual hard disk

Issue: QCOW2 File Corruption.

Download the latest stable VirtIO drivers for Windows (from docs.fedoraproject.org/en-US/quick-docs/creating-windows-virtual-machines-using-virtio-drivers/index.html or github.com/virtio-win/kvm-guest-drivers-windows). Use the virtio-win.iso (not the beta). There are two legitimate routes: Windows 8

The challenge: Windows setup cannot see the QCOW2 disk if it expects IDE/SATA but we use virtio-block. The workaround:

Better approach – Load drivers during Windows Setup:

qemu-system-x86_64 \
  -enable-kvm \
  -cpu host \
  -smp 4 \
  -m 4096 \
  -drive file=win81.qcow2,if=none,id=drive0 \
  -device virtio-blk-pci,drive=drive0 \
  -cdrom win8.1.iso \
  -cdrom virtio-win.iso \
  -boot d \
  -vga qxl \
  -machine type=q35,accel=kvm \
  -usb -device usb-tablet

When Windows Setup starts, at the "Where do you want to install Windows?" screen:

QCOW2 supports the TRIM command. When Windows 8.1 "deletes" a file, the virtual disk needs to know it can reclaim that space.