Install Hyper-V Server 2012 in VM VirtualBox

Problem
When try to install Hyper-V Server 2012 will get the error as below

Your PC needs to restart.
Please hold down the power button.
Error code: 0x000000C4
Parameters:
0×0000000000000091
...

Solution

1. Go to command prompt by click START, type cmd.
2. Find your virtual machine name that want to install Hyper-V server, to list down all existing virtual machine,type "c:\Program Files\Oracle\VirtualBox\VBoxManage.exe" list vms
3. After found the VM name, type this command: "c:\Program Files\Oracle\VirtualBox\VBoxManage.exe" setextradata [your vmname] VBoxInternal/CPUM/CMPXCHG16B 1
4. Done.

For more info pls refer http://en.wikipedia.org/wiki/X86-64