1. Logging into Plesk*
2. Click on the Websites & Domains tab.
3. Click on Show Advanced Operations (a small grey link in the middle of the page), if the advanced options are not already shown.
4. Click on Scheduled Tasks.
5. Select the appropriate system user.
6. Check the box next to the Scheduled Task you want to remove.
7. Click on the Remove button.
8. It will load a new page and ask if you really want to deleted it.  Check the Confirm Removal box and click on the OK button.
9. You will be taken back to the Scheduled Tasks screen and it should say: “Information: Scheduled tasks were removed.”