Windows - 81 Qcow2 Install

Before you begin, ensure you have the following components ready:

Set chipset to q35 for better modern hardware support. Firmware: Choose BIOS or UEFI .

You'll need a legitimate copy of Windows 8.1. Microsoft provides it as an ISO file through its official website or through other official channels. Save the ISO file to a directory on your host machine.

Once ready, move the .qcow2 file to your target storage pool. For standard KVM installations, the default path is usually /var/lib/libvirt/images/ . 3. Importing the QCOW2 Image into KVM/QEMU

Here’s how to install Windows 8.1 on KVM/QEMU step by step. windows 81 qcow2 install

Assign at least 2GB RAM (4GB+ recommended) and 2+ vCPUs 1.2.4.

Now, start the VM with a command that attaches the installation ISO, the VirtIO driver ISO, and your newly created QCOW2 image. For Windows, it is best to start with a simpler non-VirtIO disk configuration to avoid driver issues during the initial OS installation. This command uses the e1000 network card and an IDE drive to get the system installed.

Right-click the device -> -> Browse my computer . Select the CD-ROM drive containing the VirtIO ISO.

Once QEMU launches, you'll see the Windows installer. Follow these steps: Before you begin, ensure you have the following

This is because the virtual hard drive is on a VirtIO controller, which the installer views as an alien device.

# Create a clean master installation qemu-img create -f qcow2 -o preallocation=metadata win81-master.qcow2 40G # Install Windows once, configure it, then use it as a backing file qemu-img create -f qcow2 -b win81-master.qcow2 win81-child.qcow2

At this point, Windows may not detect your virtual disk because it lacks drivers for the VirtIO SCSI controller. This is normal and expected.

In this command, -f qcow2 specifies the disk image format, win81.qcow2 is the name of the image file, and 40G sets the maximum size of the virtual hard disk. It is generally recommended to allocate at least 40GB for a usable Windows system. Microsoft provides it as an ISO file through

Set your virtual disk cache mode to Writeback within your hypervisor settings. This yields a massive performance boost for database and file operations.

For your Windows 8.1 VM to function optimally, you must install the proper VirtIO drivers.

Now, launch QEMU with your Windows 8.1 ISO attached as a CD-ROM. For , use the following command: