Hi,
My system is: Windows Server 2003 SE SP2 with latest updates, DNP v2.8.2
If you set Scheduled Task priority to LOW or BELOW NORMAL it does NOT seem to work.
Steps to reproduce:
1. Create Execute System Command task in System space.
2. Set priority to LOW or BELOW NORMAL (I did not test with others).
Task example: 
Expected Result: The task is executed with LOW priority.
Actual Result: The task always executes with NORMAL priority.
Result: 
Could someone confirm this happens, so it not my system only please?
Content of test.bat in my test case was:
copy D:\veryVeryLarge.mp3 E:\
Thank you.
P.S. I just tried Max Execution Time and does not make any effect as well.
I set it to 3 seconds, but process still was executed for more than 10 seconds.