: QCOW2 images support features like snapshots and sparse allocation, which saves disk space.
A windows-xp.qcow2 file is essentially a ready-to-boot virtual hard drive. Adding to your search indicates you want a version where service packs (SP3), security patches, and perhaps POSready 2009 updates have been integrated.
: Essential for performance on KVM/Proxmox. Without these, disk I/O and networking will be significantly slower.
:Use a Windows XP ISO (which you can find on legacy software repositories like the Internet Archive ) to boot the VM and install the OS onto your new .qcow2 file. 2. Convert Existing Virtual Disks