[amel27]

By default, to schedule a task, you must be a member of the Administrators, Backup Operators, or Server Operators group on the local computer. By default, when creating a scheduled task, you cannot enter a user who belongs to a group that has more rights than the group you belong to. For example, if you are a member of the Backup Operators group on the local computer, you cannot specify a member of the Administrators group when creating a scheduled task. However, a member of the Administrators group can enable a member of any group to create or modify scheduled tasks, by using the cacls command to modify the discretionary access control list (DACL) of the Tasks folder. By default, the Tasks folder is located in the \Windows folder on the hard drive of the local computer, for example C:\Windows\Tasks. For more information about using cacls, see Cacls. For more information about groups, see Default local groups and Default groups. Note: A user for whom you assign permissions to the Tasks folder using cacls will be able to access scheduled tasks for all users. Choose which users to give access to the Tasks folder judiciously

http://technet.microsoft.com/en-us/l...25(WS.10).aspx