====== Virtual Box on Windows ======
===== Headless Virtual Machines =====

Add command path to Windows in elevated Command Prompt:
<code>
set PATH=%PATH%;"C:\Program Files\Oracle\VirtualBox"
</code>

Find the UUID of your VMs with:
<code>
VBoxManage list vms
</code>

To run a VM as headless, make a Batch file containing:
<code>
VBoxManage startvm {uuid} --type headless
</code>

To run a headless VM at Windows boot, make a scheduled task that runs the batch file above. Make sure to disable the time limit on task.

To stop a headless VM, make a batch file containing:
<code>
VBoxManage controlvm {uuid} acpipowerbutton
</code>
This will shutdown the VM properly. If for some reason the VM does not respond to it you can us 'poweroff' instead. This simulates a hard shutdown.