VM won't start after disk set to virtio

Hi,

I need your help because the Windows VM won't start after virtio block set on disk.

I've converted the disk image:
qemu-img convert -O qcow2 -c /backup/images/vm-101-disk-1.qcow2_backup vm-101-disk-1.qcow2

I've installed the virtio drivers on the Windows VM (Windows Server 2012 R2).

I down the VM.
Change IDE to Virtio Block
Change boot order
After, i start VM.

Windows is loading (circle), and blue screen (can't start).
After 2 boot, i'm redirected to repair.

My config machine...

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