Step 1: Create a basic task with a name

Step 2: Set a schedule

Step 3: Click "Start a program"

Step 4: It will open the System32 directory, I then searched for "powershell.exe", click the right one

Step 5: Input into arguments the code I provided above

Start-Process "C:\Users\YOURUSERNAME\Desktop\Backup SQL\backup_mariadb.bat"

This will trigger the powershell file which will trigger the bat file to the schedule that you set

Final step: Hit finish and then you should see it in your scheduler.

TIP: You can right click and click run to see it do its thing. This would be classed as a test