I am using Ubuntu 14.04 and have installed windows 7 using virtual box. After Ubuntu update, when I try to power on windows 7, the following error message comes:

Failed to open a session for the virtual machine Windows 7 x64.

The virtual machine 'Windows 7 x64' has terminated unexpectedly during startup with exit code 1 (0x1).

Result Code: NS_ERROR_FAILURE (0x80004005)
Component: Machine
Interface: IMachine {480cf695-2d8d-4256-9c7c-cce4184fa048}

I have tried the following and its still not working

sudo apt-get install linux-headers-generic build-essential dkms
sudo apt-get remove --purge virtualbox-dkms
sudo apt-get install virtualbox-dkms

It shows a dependency error when installing virtualbox-dkms

The following packages have unmet dependencies:
 virtualbox-dkms : Depends: virtualbox (>= 4.3.10-dfsg-1)
E: Unable to correct problems, you have held broken packages.

2 Answers 2


Had the same issue after ubuntu 14.04 update, this is what worked for me:

sudo apt-get install dkms

sudo /etc/init.d/vboxdrv setup

Had the same problem as you with a recent Ubuntu update. Updating VirtualBox to 4.3.20 worked for me. Download the deb file for Ubuntu 14.04 here:


Then uninstall VirtualBox 4.3.18 and install new version:

sudo apt-get remove virtualbox

sudo dpkg -i virtualbox-4.3_4.3.20-96996~Ubuntu~raring_amd64.deb

Replace amd64 with i386 if you're running a 32 bit system. Hope this helps.

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