A scheduled task is forcibly canceled in Windows Vista or in Windows Server 2008
You schedule a task on a computer that is running Windows Vista or Windows Server 2008. However, the scheduled task is forcibly canceled by the TaskEng.exe process. Additionally, the following events are logged:
Event ID: 330
Message: Task Scheduler stopped the instance name instance of task task name as request by user user name.
Event ID: 111
Message: Task Scheduler terminated the instance name instance of the task name task.
For more information on this issue, including potential causes, workarounds, and resolutions, see: Microsoft KB Article KB2649317.