The virtual machine 'homestead-7' has terminated unexpectedly during startup with exit code 1 (0x1)

Ubuntu Fix:

There was an error while executing `VBoxManage`, a CLI used by Vagrant for controlling VirtualBox. The command and stderr is shown below.
Command: ["startvm", "d931a177-899b-498f-b46d-c06a047d005a", "--type", "headless"]
Stderr: VBoxManage: error: The virtual machine 'homestead-7' has terminated unexpectedly during startup with exit code 1 (0x1)
VBoxManage: error: Details: code NS_ERROR_FAILURE (0x80004005), component MachineWrap, interface Imachine

Fix: Close Virtual Box In a terminal enter

sudo apt-get remove virtualbox-\*

Download Virtual Box 5.1 again and install. Run

vagrant up