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<topic xml:lang="en-us" id="vboxsvc-session-0">
  <title>VBoxSVC running in Windows Session 0</title>
  
  <body>
    <p><ph conkeyref="vbox-conkeyref-phrases/product-name"/> supports executing the VBoxSVC in Windows session 0. This allows VBoxSVC to run like a regular Windows service, which in turn enables headless VMs to continue running even if the user logs out.</p>
    <p>The feature is disabled by default and can be enabled by creating a REG_DWORD value <codeph>ServerSession0</codeph> in the key <codeph>HKEY_LOCAL_MACHINE\Software\Oracle\VirtualBox\VBoxSDS</codeph> of the Windows registry. Specify <codeph>1</codeph> as the value's data to enable the feature, or <codeph>0</codeph> to disable the feature. A host reboot is needed in order to make the change effective.</p>
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