VirtualBox: Your PC needs to restart. Error Code: 0x000000C4 (Windows 8)

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Your Windows 8 installation using VirtualBox gave below error,

Your PC needs to restart. 
Please hold down the power button.
Error Code: 0x000000C4


Upgrade the VirtualBox to the latest (version 4.3.2 – during this article was published). We encountered this error in VirtualBox 4.2.3.

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  • TheGroundZero

    An other fix is:
    * In Linux type the following in a terminal:
    VBoxManage setextradata [vmname] VBoxInternal/CPUM/CMPXCHG16B 1
    * In Windows type the following in a command prompt:
    “C:Program FilesOracleVirtualBoxVBoxManage.exe” setextradata [vmname] VBoxInternal/CPUM/CMPXCHG16B 1

    NOTE: Be sure to replace [vmname] with the name of your virtual machine.

  • TheGroundZero

    Also, using an IDE-controller for your HDD with an inflated disk might help.
    Be sure to provide enough Memory to your VM

  • TheGroundZero

    Don’t forget to enable PAE/NX

  • Raisul

    I’ve tried those thing but when i run the command it shows another error saying that VBoxManage.exe: error: could not find registered machine named ‘[server2012]’

    my machine name is server 2012

    • resphoi

      so is it “server2012” or “server 2012″… Use “” if the name contains spaces

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