QEMU Windows low performance due to QMEU string

# Copyright (c) 2016, Andrea Dainese
# Copyright (c) 2018, Alain Degreffe
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---
type: qemu
name: Winserver
description: Windows Server
cpulimit: 1
icon: Windows-PC.png
cpu: 6
ram: 8192
ethernet: 1
console: vnc
shutdown: 1
qemu_arch: x86_64
qemu_version: 2.0.2
qemu_options: >-
  -machine type=pc,accel=kvm
  -cpu host,hv_relaxed,hv_vapic,hv_spinlocks=0x1fff,hv_time
  -vga std
  -usbdevice tablet
  -boot order=c
  -drive file=/opt/qemu/share/qemu/virtio-win-drivers.img,index=1,if=floppy,readonly
...

# Copyright (c) PNETLab
---
type: qemu
name: Win
description: Windows
cpulimit: 1
icon: Windows-PC.png
cpu: 2
ram: 4096
ethernet: 1
console: vnc
shutdown: 1
qemu_arch: x86_64
qemu_version: 4.1.0
qemu_options: >-
  -machine type=pc,accel=kvm
  -cpu host,hv_relaxed,hv_vapic,hv_spinlocks=0x1fff,hv_time
  -vga std
  -usbdevice tablet
  -boot order=c
  -drive file=/opt/qemu/share/qemu/virtio-win-drivers.img,index=1,if=floppy,readonly
...