[libvirt-users] Probem with Windows 2012 R2 server

Hi, I'm having a lot of trouble with a Server 2012R2 evaluation version. I'm testing it to see how good it works in libvirt-kvm. It seems the server won't run longer than a few days. After a few days, when I shut down the server, she won't start again. Has anybody have experienced the same??? My Windows 8.1, and Linux VM's works perfectly... Greetings