$ qemu-system-x86_64 -enable-kvm ...
If you already have a Windows 10 virtual machine running on VirtualBox ( .vdi ) or VMware ( .vmdk ), you can convert it to QCOW2 without reinstalling the operating system. Convert VMDK (VMware) to QCOW2
This guide will use the command line, as it is universal across all Linux distributions. For those who prefer a graphical interface, the steps are almost identical using virt-manager (Virtual Machine Manager).
First, allocate a virtual disk space. Windows 10 requires at least 32 GB, but 64 GB or more is highly recommended for standard workflows. Run the following command in your Linux terminal: qemu-img create -f qcow2 windows10.qcow2 64G Use code with caution. Step 2: Download VirtIO Drivers
This command works for VDI, VHD, VHDX, and RAW formats as well. Windows 10.qcow2
qemu-img convert -O qcow2 Windows10.qcow2 Windows10_shrunk.qcow2 Use code with caution.
1. Windows Boot Loop / Blue Screen (INACCESSIBLE_BOOT_DEVICE)
virsh snapshot-create-as --domain win10 --name "clean-install" --disk-only --atomic
qemu-img create -f qcow2 win10.qcow2 80G $ qemu-system-x86_64 -enable-kvm
Security professionals use these images in isolated labs to analyze malware or test network configurations in a controlled "sandbox". How to Use the File
To help me tailor any specific commands or optimization scripts, please tell me:
Windows doesn't include VirtIO drivers natively. You’ll need to download the VirtIO Win ISO
Both VMs boot from the same base, but write changes to their own 100KB overlay. This saves immense disk space in lab environments. For those who prefer a graphical interface, the
It supports internal snapshots, allowing easy recovery points.
If you over-provisioned the VM (e.g., allocated 200 GB on a 120 GB host SSD), a massive Windows update or file transfer can cause the QCOW2 to fill the host drive completely.
$ sudo chown root:root /var/lib/libvirt/images/win10.qcow2 $ sudo chmod 644 /var/lib/libvirt/images/win10.qcow2