Scheduled Tasks

[Del80y]

Hi all
Well i want to schedle disk defag to stat ever month as i allways forget to do it.
But when iset it up to do this i get this message

"The new task has been created, but may not run beacause the account information could not be set. The specific error is: 0x80070005; Access is denied. Try using the task page browse button to locate the application"

OK so i followed the instructions and checked for the application. I can only find the application in C:\Documents and Settings\All Users\Start Menu\Programs\Accessories\System Tools. I told the task to start the app from there but i got the same message.

I also tryed using the search my computer and it could only find the app in C:\Documents and Settings\All Users\Start Menu\Programs\Accessories\System Tools as well.
[EDIT] forgot to say my OS is windows xp service pack 2, media center edition

Can anyone instruct me as to how to set it up ?

[GroundZero3]

http://support.microsoft.com/default...b;en-us;884573

[Del80y]

Thanks groundzero3 that really help.
Im not going to use it as i dont want my account to have a password. So i will just set a reminder insted to tell me to do it.