Some of the questions are tagged with both.
Edit: This is a clearcut synonym request that was raised over 5 years ago but has not been acted on. It was bumped 2 years ago by incorporating it into another tag cleanup effort and making it a duplicate of that. However, it didn't get handled then, either. The task-scheduler tag has recently been cleaned up in preparation for making it a synonym. Please reopen this question and synonomize the tags.