QCOW2的全称是“QEMU Copy-On-Write version 2”，是由QEMU（Quick Emulator）开源虚拟化项目定义的第二代磁盘镜像格式。它本质上是一种QEMU与KVM（Kernel-based Virtual Machine）结合使用的虚拟磁盘文件格式。
通过如下命令可直接创建并启动一个Windows 11的QCOW2镜像： windows+xpqcow2+top
Inside Windows, find top CPU users:
For those needing a clean, full installation rather than a pre-made virtual disk, official-style for Windows XP (including Professional x64 Edition with SP2) are hosted on Archive.org . windows+xpqcow2+top
If you are using QCOW2 snapshots, you do not need Windows XP's native System Restore, which creates excessive I/O. windows+xpqcow2+top
The way the host system (Linux) handles the QCOW2 file heavily impacts guest performance.