Right-click the task you want to modify, and then click Properties.
Do one or more of the following:
To change the program being run, in Run, type the path for the new program.
To change the schedule for the task, click the Schedule tab.
To customize the settings for the task, click the Settings tab.
Notes
If you change the user account or the program that is being run, you must supply the password for the user account.
If the task program requires command-line options, type them in Run, after the task path.
If the path to the task program includes spaces, put double quotation marks ("") around the entire task path.
Make sure that the system date and time for your computer are accurate, as Task Scheduler relies on this information to run scheduled tasks. To verify or change this information, double-click the time indicator on the taskbar.