iso file which will be used to load the guest operating system on your computer. Furthermore, you should also have a valid guest OS.
CPU with virtualization enabled: A valid CPU is required which has virtualization enabled on it for VirtualBox to work on your computer.īefore we start with the solutions, make sure that you are logged in as an administrator on your computer. Core isolation: Windows has a core isolation option for its processors. They have to be removed for VirtualBox to work properly. Device Guard/Credential Guard: Device Guard or Credential Guard are applications which provide security of hardware and credentials on your computer. 
System Debuggers and VM Platforms: If you have installed system debuggers or other VM managers/platforms on your computer, they might conflict with VirtualBox for resources and cause some of the features not to work. It must be disabled to access the full features of the application. Hyper-V: Microsoft’s Hyper-V is known to cause issues with VirtualBox application. In the System -> Acceleration tab we may want to select the hardware virtualization features VT-x/AMD-V of your CPU if supported. 
In addition, for running 64-guests it is recommended to enable the Input/Output in the System -> Motherboard settings for your virtual machine: The virtual machine from Virtual Box Manager needs to be set to 64-bit in General -> Basic settings: Let me suggest you try to update both, your host Ubuntu (at present kernel 3.2.0-24), and Virtual Box (see also this answer). was only added in Virtual Box version 4.1.8. Depending on your CPU you also may want to enable it's virtualization features in the BIOS (VT-x for Intel, or AMD-V).īoth, your host, and Virtual Box should be able to run 32-bit or 64-bit Debian as a guest. The at present most recent Virtual Box release is 4.1.14. It is not clear what version of Virtual Box is installed. From your details I assume you run a 64-bit Ubuntu host, likely Ubuntu 12.04 beta.
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