Windows 10qcow2 Jun 2026

When defining your QCOW2 storage backend in Proxmox or QEMU, always apply these settings:

Because QCOW2 expands dynamically, deleting files inside Windows 10 does not automatically shrink the QCOW2 file on the host. To fix this, enable support: Ensure your disk bus is set to VirtIO SCSI .

Attach both the and the VirtIO drivers ISO to your VM as separate CD-ROM drives. Boot into the Windows installer.

If you value features over absolute raw speed, qcow2 is the way to run Windows 10 on KVM/QEMU. windows 10qcow2

qemu-img convert -O qcow2 -c win10.qcow2 win10_compressed.qcow2 Use code with caution. Creating Linked Clones (Master Template)

Are you looking to run Windows 10 on a virtual machine, but your hypervisor only supports QCOW2 images? Look no further! In this article, we'll walk you through the process of converting a Windows 10 installation to a QCOW2 image.

qemu-img convert -O qcow2 -c windows10.qcow2 compressed_win10.qcow2 Use code with caution. Expanding Storage Space When defining your QCOW2 storage backend in Proxmox

Why choose QCOW2 for your Windows 10 virtual machine? Here are the key benefits:

The memory management driver that dynamically reclaims unused RAM from the guest VM. How to load the drivers:

It supports built-in, end-to-end encryption at the disk image level. Boot into the Windows installer

qemu-system-x86_64 \ -m 4G \ -enable-kvm \ -drive file=windows10.qcow2,if=virtio \ -net nic,model=virtio -net user \ -cpu host Use code with caution. Copied to clipboard 3. Essential Tuning

virt-install \ --name=Windows10 \ --ram=4096 \ --vcpus=2 \ --cpu host-passthrough \ --os-variant=win10 \ --disk path=/var/lib/libvirt/images/win10.qcow2,format=qcow2,bus=virtio,cache=none,io=native \ --disk path=/path/to/windows10.iso,device=cdrom \ --disk path=/path/to/virtio-win.iso,device=cdrom \ --network network=default,model=virtio \ --graphics spice,listen=127.0.0.1 \ --video qxl \ --boot cdrom,hd Use code with caution.

The Ultimate Guide to Windows 10 QCOW2: Setup, Optimization, and KVM Deployment

The file occupies only the space actually used by the guest OS, expanding dynamically as you add data.

Windows 10’s TRIM command is not being passed through. Solution: Enable discard in the VM XML ( <driver discard='unmap'/> ) and run Optimize-Volume -DriveLetter C -ReTrim -Verbose inside Windows.