Date: 2026-04-18
Subject: Performance, compatibility, and best practices for Windows 10 on QCOW2 images.
# Create base image
qemu-img create -f qcow2 win10-base.qcow2 80G
Finish Setup: Complete the installation. Once on the desktop, open the VirtIO CD-ROM again and run the virtio-win-gt-x64.exe installer to add drivers for networking and other virtual hardware. Alternative: Converting Existing Physical Disks MS Windows Workstation - - EVE-NG
Once installed, the "story" ends with optimization. Users often "debloat" the Windows installation using tools like the Chris Titus Tech utility windows 10qcow2
Run the VM using win10-overlay1.qcow2. Any writes go to the overlay; the base remains pristine. To reset, simply delete the overlay and create a new one.
Storage Location
Place the qcow2 file on an SSD or NVMe drive. Spinning hard disks will bottleneck Windows 10’s random I/O, especially with snapshots. Technical Report: Deploying Windows 10 with QCOW2 Virtual
4. Required Drivers (VirtIO)
Windows 10 does not include native QCOW2 or VirtIO drivers. Use Red Hat VirtIO drivers for disk and network.
Caution: Do not download random qcow2 files from torrent sites or file lockers. They often contain malware, backdoors, or corrupted partitions. Instead, use trusted sources: To reset, simply delete the overlay and create a new one
Using virt-manager (GUI):