bit OS running bit VirtualBox only showing bit Guest OS. This was super .. NtCreateFile(DeviceVBoxDrvSub) failed: 0cxe. In Windows I can install a 64bit guest OS in virtualbox with no problem. However, in Your bit guest will fail to detect a bit CPU and. In order to be able to run a Bit system in a VirtualBox, you need a cpu which supports virtualization. AMD calls this function AMD-V, Intel. Many users and programmers face an issue while using VirtualBox where they are unable to see bit guest operating systems displayed on. The VirtualBox Support article I have a 64bit host, but can't install 64bit guests lists the following conditions for bit guests: You need to. Downloaded 64 bit Windows Installer (adopteesofcolor.org) After installation -->When I clicked on New I couldn't see the version.