Disk Defragmenter will run when the computer comes back up for the first
time after the missed scheduled task. The Task Scheduler team has
implemented some nice safeguards to limit the impact of such “missed†tasks
on system performance. More specifically, execution of such tasks will be
delayed by a few minutes so that they do not interfere with a computer
booting up or resuming from hibernate/sleep. In addition, such tasks are
serialized and occur one at a time.
