Note: The instructions were performed with the latest version of VirtualBox which at the time of this tutorial is 4.2.8. If you are experiencing issues with 4.1.x, please upgrade VirtualBox to this or a later release.
Many of the issues being reported appear to be related to VitualBox 4.1.x installed on the host system. There are known issues with this version and newer kernels. (https://www.virtualbox.org/ticket/11036)
I recommend you upgrade to the latest version of VirtualBox from https://www.virtualbox.org/wiki/Downloads.
Thanks
