Deploy a task-sequence only when the user is logout

[Datafast]

Is there an option that can I setup that allow me to start a task-sequence installation only if it is detected the user is logged off (not using the PC)?

[Datafast]

Any suggestion?

[anyweb]

dont use a task sequence, use a powershell script that runs based on events that are triggered from actions that you are interested in, such as logon, logoff etc...