virtio drivers

Most common absolute minimum for Windows:

• PCI Device VEN_1AF4 DEV_1002
  • VirtIO Balloon Driver Balloon\w10\amd64
• PCI Simple Communications Controller VEN_1AF4 DEV_1003
  • VirtIO Serial Driver vioserial\w10\amd64
• SCSI Controller VEN_1AF4 DEV_1001
  • Red Hat VirtIO SCSI controller viostor
• SCSI Controller VEN_1AF4 DEV_1004
  • Red Hat VirtIO SCSI pass-through controller vioscsi\w7\amd64
• NetKVM
  • NetKVM\w7\amd64

Or simply run installer from CD: virtio-win-gt-x64.exe

All PCI IDS from QEMU you can find here: PCI IDs for qemu

• vm generation id (ACPI/QEMUVGID)

After switching to QXL graphic, new unkown device will appear in Windows 10: Video Controller (VGA Compatible). Install driver from qxldod folder.