The Task Scheduler MMC snap-in stops responding when you view the history tab of a task that has more than 10,000 history events on a computer that is running Windows Server 2008 or Windows Vista
Consider the following scenario:
- You have a computer that is running Windows Server 2008 or Windows Vista.
- The event history for a scheduled task is larger than approximately 10,000 events.
In this scenario, when you view the history tab, the Task Scheduler Microsoft Management Console (MMC) snap-in stops responding.
For more information on this issue, including potential causes, workarounds, and resolutions, see: Microsoft KB Article KB974589.