Updated: December 6, 2007
Applies To: Windows Server 2008
A backward compatible task is a Task Scheduler 1.0 task that is used in the Windows XP, Windows Server 2003, and Windows 2000 operating systems. A Task Scheduler 1.0 task can be registered (scheduled) to execute any of the following application or file types: Win32 applications, Win16 applications, OS/2 applications, MS-DOS applications, batch files (*.bat), command files (*.cmd), or any properly registered file type.
You can register a Task Scheduler 1.0 task in one of three ways:
Use the error code provided in the failure event to identify possible reasons the task failed to register. The error code descriptions are listed below.
Use Task Scheduler to define and register a task compatible with earlier operating systems.
To register the Task Scheduler 1.0 task:
1. Click the Start button and type Task Scheduler in the Start Search box.
2. Select the Task Scheduler program to start Task Scheduler.
3. Click Create Task.
4. On the General tab, set the Configurefor.
A task's trigger is not found. Try to edit the task's triggers.
One or more of the properties required to run this task have not been set.
There is no running instance of the task.
The Task Scheduler service is not installed on this computer.
The task object could not be opened.
The object is either an invalid task object or is not a task object.
No account information could be found in the Task Scheduler security database for the task indicated. Set the account information for the task.
Unable to establish existence of the account specified. Set the account information for the task.
Corruption was detected in the Task Scheduler security database; the database has been reset.
Task Scheduler security services are available only on Windows NT.
The task object version is either unsupported or invalid.
The task has been configured with an unsupported combination of account settings and run time options.
The Task Scheduler Service is not running. Start the Task Scheduler service.
The task XML contains an unexpected node.
The task XML contains an element or attribute from an unexpected namespace.
The task XML contains a value which is incorrectly formatted or out of range.
The task XML is missing a required element or attribute.
The task XML is malformed.
The task is registered, but not all specified triggers will start the task.
The task is registered, but may fail to start. Batch logon privilege needs to be enabled for the task principal.
The task XML contains too many nodes of the same type.
The task cannot be started after the trigger end boundary.
An instance of this task is already running.
The task will not run because the user is not logged on.
The task image is corrupt or has been tampered with.
The Task Scheduler service is not available.
The Task Scheduler service is too busy to handle your request. Please try again later.
The Task Scheduler service attempted to run the task, but the task did not run due to one of the constraints in the task definition.
The Task Scheduler service has asked the task to run.
The task is disabled.
The task has properties that are not compatible with earlier versions of Windows.
The task settings do not allow the task to start on demand.
Attempt to reregister a Task Scheduler 1.0 (prior to Windows Vista) compatible task and verify that the registration succeeds. You can register a Task Scheduler 1.0 task in three ways:
After you register the task, open Task Scheduler, select the task in the task folder hierarchy, and click the History tab for the task to verify that it contains events indicating the task was registered successfully.
Backward Compatible Task Registration
Management Infrastructure