Solved Cannot connect to the virtual machine...

Hello,

I've created a Virtual Machine in HyperV.
When trying to connect to the virtual machine from the HyperV Manager after 1 minute I receive an error message: "Cannot connect to the virtual machine. Try to connect again. If the problem persists, contact your system administrator".

I dont see any error in the event log.
I cannot connect with RDP because i dont have any operating system installed yet.

Any suggestion?
Thanks.

Bitdefender 2013 was the problem, it was not working not even stopping the firewall and the anti vírus services.
After removing the Bitdefender it works fine.
Thanks,