Stopping Running Tasks and Closing Scheduler

To close scheduler:

Click the Close button in the task scheduler dialog box.
Select the Close item in the context menu of the icon.

Clicking the Close button in the scheduler dialog box closes only scheduler dialog box, the scheduler continues working and it will be available in the notification area. To close the task scheduler, select the Close item in the context menu of the icon.

After the running tasks are stopped, if required, refresh settings of task scheduler and start tasks for execution with required parameters.