Why HP Microserver Gen 8 ribotide when you try to install Windows Server 2008r2 in Proxmox?

Friends, so that's an interesting problem.
There is a Microserver, is it Proxmox, trying to install Windows Server 2008r2 and in installation process to unpack the files the server is rebooted.
Other OSes installed fine. Tried W10, Linux, etc.
What could be the problem?
In the logs Proxmox clean at all, no panic, nothing like the power reset and everything.

UPD. 2012r2 is also not intended, to extract the files, rebotics server.
July 2nd 19 at 17:58
1 answer
July 2nd 19 at 18:00
Proxmox last?
And what logs to look Proxmox?

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