exchange 2013 unable to boot

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http://serverfault.com – I'm testing Exchange 2013 on a Hyper-V VM with Windows Server 2012 with a couple of problems. The most important so far is that the VM can't boot windows and when I'm lucky it takes 30 minutes to 1 hour to boot. After 1 or 2 minutes it stays in a "please wait" screen and the bullets freeze The server configuration it self is a single virtual core VM with 1024MB of ram (dynamic memory 128MB~2048MB). It uses a normal 40GB NTFS formatted VHDX hdd The VM has exchange roles and active directory roles (standalone) the server is fully updated This problem occurs since the first reboot after inst (HowTos)