You can stop a workflow at any point in its progress. A stopped workflow cannot be restarted.
To stop a workflow:
Select Tools > Workflow > Workflow Reporting
Tip: Alternately, you can select Tools > Workflow > My Workflows.
Select one or more workflows.
Select Tools > Workflow > Stop Workflow.
To ensure that the workflow is automatically deleted from your workflows list, select the Aborted workflow will be deleted option.
If prompted to confirm, click OK.