The highest quality file is always the one you create yourself. You can easily convert a clean Windows XP ISO into a premium QCow2 file using standard command-line tools. How to Convert a Windows XP ISO to QCow2
To ensure you download a high-quality Windows XP QCOW2 file: Windows Xp Qcow2 File Download High Quality
This guide explores the best resources, the importance of high-quality images, and how to set them up efficiently. Why Choose a High-Quality Windows XP Qcow2 Image? The highest quality file is always the one
qemu-img convert -f vmdk -O qcow2 original_file.vmdk converted_file.qcow2 Google Cloud Documentation How to Run a Windows XP Virtual Machine (VirtualBox ISO) the importance of high-quality images