Bugs
On Windows 2000 and Windows XP, tasks assigned to run with SYSTEM privileges do not function when the computer is prepared for disk imaging with sysprep. Sysprep changes security identifier (SID) to avoid duplication but does not update scheduled tasks to use the new SID. Consequently, all SYSTEM scheduled tasks fail to run on the imaged computers. There is no solution for this problem but one may reschedule the tasks to work around the issue.
On Windows Vista or Windows Server 2008, where Service Pack 2 is not installed, repeating scheduled tasks may be repeated incorrectly and the next execution time displayed in Task Scheduler may be wrong. Microsoft does not elaborate how exactly wrong is this repetition, but a patch is available for this bug.
On Windows Vista, 7, 2008, and 2008 R2: The MMC Component says that you are running "Task Scheduler 1.0" when in fact you are running 2.0, this is a Trivial bug so it wasn't noticed, and is likely due to the re-write of the task scheduler. The Version has been corrected to 2.0 in Windows 8, and 2012
Read more about this topic: Windows Task Scheduler
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