Without these drivers, a Windows virtual machine (VM) will not detect virtual disks (virtio-blk or virtio-scsi) or virtual network interfaces (virtio-net). The VM will see unknown devices, and basic operations like installation or booting from a disk will fail.

: Dynamic memory management to reclaim unused RAM from the guest.

The Virtio Windows drivers ISO is a bootable image that contains a collection of Windows drivers for Virtio devices. These drivers allow Windows guests to communicate with the host's Virtio devices, such as network interfaces, block devices (hard drives and SSDs), and balloon devices (for memory management). The ISO image can be mounted on a Windows VM, enabling the installation of the Virtio drivers.