To improve performance, you can defer on-demand scan tasks when battery power is low or during presentations. You can also allow the user to defer scheduled scans for one-hour increments between one and twenty four hours or to defer it forever. Each user deferral is one hour in duration. For example, if the Defer at most option is set at 2, the user can defer the scan task two times or two hours. When the maximum specified number of hours elapses, the scan continues. If the administrator allows unlimited deferrals by setting the option to zero, the user can continue deferring the scan forever.