Windows 10 in VirtualBox on a Mac

I was recommended to take Windows 10 for a spin so I chose the free VirtualBox for Mac. After adding the Windows 10 ISO as a CD/DVD Drive to a new VM, I got this:

Your PC needs to restart.
Please hold down the power button.
Error Code: 0x00000005D

To get it working, I quit VirtualBox and at the Terminal changed to the VirtualBox directory:

$ cd /Applications/

I then ran this command (where Windows 10 is the name I gave my virtual machine):

$ VBoxManage setextradata "Windows 10" VBoxInternal/CPUM/CMPXCHG16B 1

After that the Windows 10 installation worked perfectly.

I figured this out from the following link which explains what that command actually does. Thanks!

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