Windows 10qcow2 [hot] Jun 2026

stands for QEMU Copy-On-Write version 2 . It is the native disk image format for the QEMU/KVM virtualization stack. Unlike the flat, pre-allocated .raw format or VMWare’s .vmdk , QCOW2 offers three massive advantages:

Windows 10 doesn’t know it’s running on a QCOW2 image. Without tuning, performance can be sluggish. windows 10qcow2

Why 80G? Windows 10 needs at least 64 GB for comfort (updates require significant space). The -f qcow2 flag specifies the format. stands for QEMU Copy-On-Write version 2

# Take snapshot virsh snapshot-create-as win10 --name "pre-update" pre-allocated .raw format or VMWare’s .vmdk

Now go virtualize – your Linux host will thank you.

Using virt-install (command line):