Because Windows does not include VirtIO drivers natively, mount the downloaded VirtIO ISO as a secondary virtual CD-ROM drive. Once Windows boots, open Device Manager, locate any flagged components (Storage controller, Ethernet controller, PCI devices), and update their drivers by pointing the search to your virtual CD-ROM drive. Run virtio-win-gt-x64.msi from the guest OS to install all performance drivers simultaneously. Summary Checklist for the Best Setup Why It Matters Download VHDX from Microsoft Developer Site Guarantees safety, security, and integrity. 2. Convert Use qemu-img convert -O qcow2 -c Creates a space-efficient, thin-provisioned virtual disk. 3. Emulate Configure Q35, UEFI (OVMF), and vTPM 2.0 Satisfies Windows 11 mandatory system requirements. 4. Optimize Install VirtIO Drivers (Storage, Net, GPU) Delivers fast disk I/O and low network latency.
Download the official from Microsoft's website.
qemu-system-x86_64 ... -tpmdev passthrough,id=tpm0,path=/dev/tpm0 -device tpm-tis,tpmdev=tpm0 Windows 11 Qcow2 Download BEST
: Boot your VM manager (like QEMU/KVM, Proxmox, or GNOME Boxes) using the ISO and point it to your newly created .qcow2 file as the primary storage. Optimization Tips
Once you've downloaded the Windows 11 Qcow2 image, follow these steps: Because Windows does not include VirtIO drivers natively,
: This site provides semi-official Windows Cloud Images specifically designed for OpenStack and KVM, including VirtIO drivers.
: If your standard ISO complains about TPM 2.0 or Secure Boot, press Shift + F10 on the language selection screen to open CMD. Enter these commands to bypass the check: Summary Checklist for the Best Setup Why It
: Use a command similar to the one below to boot the Windows ISO. This example uses q35 chipset and UEFI firmware (required for standard Windows 11):
Creating your own image gives you complete control over the Windows edition (Home, Pro, Enterprise, or LTSC) and ensures that you are not using a potentially tampered file.
For maximum compatibility, security, and performance, creating your own image from official sources is the gold standard.
Unlike a standard RAW disk image that immediately consumes the maximum amount of space you allocate, a Qcow2 file is dynamically allocated . It starts small (often just a few megabytes) and automatically grows as you add data to your virtual machine, up to a limit you set. This is a major advantage for saving disk space.