A dual boot vm!! Install win 7 and 10 at once with same uuid.

I thought i would try and dual boot a vm. Why? Well no reason really, just wondered if it could be done on a vm, but maybe useful for the last few hours windows 7 can be upgraded to 10.

Install the windows 7 on one partion of vdisk and 10 on another. Both machines will then share the same uuid so activation should be possible on both.

If you want to try just install win 7 first as normal  but after loading the VirtIO Drivers. Make 2 partions. Install 7 on first.

After installation of 7 is complete.

Change the install image to win10 iso (or windows 7 again then upgrade it to 10) then edit xml so cd image has <boot order='1'/> and vdisk has boot <boot order='2'/>.

disk type='file' device='cdrom'>
      <driver name='qemu' type='raw'/>
      <source file='/mnt/user/software/operating systems/windows/win7.iso'/>
      <backingStore/>
      <target dev='hda' bus='sata'/>
      <readonly/>
      <boot order='1'/>
      <alias name='sata0-0-0'/>
      <address type='drive' controller='0' bus='0' target='0' unit='0'/>
    </disk>
    <disk type='file' device='disk'>
      <driver name='qemu' type='qcow2' cache='writeback'/>
      <source file='/mnt/user/virtual systems/1 dual boot Windows 7/vdisk1.img'/>
      <backingStore/>
      <target dev='hdc' bus='sata'/>
      <boot order='2'/>
      <alias name='sata0-0-2'/>
      <address type='drive' controller='0' bus='0' target='0' unit='2'/>
    </disk>

Start vm the start vnc as quick as poss then quickly press any key to boot from cd/dvd and install win 10 (or windows 7 again then upgrade it to 10) on second partition.