This is crucial for optimal performance. VirtIO drivers are paravirtualized drivers for KVM that dramatically improve disk I/O and network performance, bringing VM speeds close to bare-metal levels. Download the latest virtio-win ISO from Fedora's repository: https://fedorapeople.org/groups/virt/virtio-win/direct-downloads/latest-virtio/ These drivers support Windows 8.1 (both 32-bit and 64-bit versions).
sudo apt update && sudo apt install qemu-kvm libvirt-clients libvirt-daemon-system virtinst virt-manager Use code with caution.
Right-click the device -> -> Browse my computer . Select the CD-ROM drive containing the VirtIO ISO.
Minimum 1 core (2+ cores highly recommended for smooth operation). RAM: Minimum 2 GB (4 GB recommended for 64-bit instances).
Windows can pass TRIM commands to the host OS to shrink the QCOW2 file when files are deleted. Open as an Administrator and run: powershell Optimize-Volume -DriveLetter C -ReTrim -Verbose Use code with caution. 2. Disable Hibernation windows 81 qcow2 install
Before beginning the installation, ensure you have the following:
-boot order=d : Forces the virtual machine to boot from the CD-ROM drive first. Step 3: Load VirtIO Storage Drivers During Setup
Once the installation finishes, Windows 8.1 will boot into the desktop. However, you will notice that the internet is disconnected and the screen resolution is limited.
Windows will install the drivers for VirtIO Networking, Ballooning, and SCSI controllers 1.2.1. This is crucial for optimal performance
After Windows boots successfully, you should install the remaining VirtIO drivers for optimal performance:
Ensure your virtual disk configuration has discard='unmap' enabled so that deleted files within Windows actually free up space on the host SSD.
If you are looking to set this up on a specific Linux distribution (like Ubuntu or Fedora), I can provide the exact command-line installation steps.
Select "Select or create custom storage," browse, and select the windows81.qcow2 file created in Step 1. sudo apt update && sudo apt install qemu-kvm
The --compress option enables zlib compression, further reducing the file size.
Boot into the Windows 8.1 installation environment and click . Enter your product key and accept the license terms. Choose Custom: Install Windows only (advanced) .
This guide provides a comprehensive, step-by-step walkthrough to successfully create a QCOW2 image, load the necessary VirtIO drivers, and optimize your Windows 8.1 virtual machine for peak performance. Prerequisites
This is the most reliable method. We create a blank QCOW2 file and boot the Windows ISO.