#14355
Michael Pietroforte
Keymaster
Member Points: 39,537
Author of the year 2018
Rank: 4

I got the same error message. It doesn’t matter if you install from the ISO or the VHD. You always get:

Your PC needs to restart.
Please hold down the power button.
Error code: 0x000000C4
Parameters:
0x0000000000000091
0x000000000000000F
0xFFFFF801E5962A80
0x0000000000000000

The solution to the problem is this command:

"c:\Program Files\Oracle\VirtualBox\VBoxManage.exe" setextradata [vmname] VBoxInternal/CPUM/CMPXCHG16B 1

You have to replace vname with the name of your Virtual Machine which you can find in the VirtualBox interface or with this command:

"c:\Program Files\Oracle\VirtualBox\VBoxManage.exe" list vms

Don’t forget to set the VM name in quotes if it contains blanks.

The command enables the CPU instruction CMPXCHG16B. More info here.

I tried it with the VHD of Windows Server 2012 R2 Preview and it with the ISO.

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