Overview of Task Scheduler
Task
Scheduler is a tool that enables you to schedule tasks (such as Disk
Defragmenter) to run regularly, when it’s most convenient for you. Task
Scheduler starts each time you start Windows and runs in the background.
When Task Scheduler is running on a computer with Windows 95 or later,
an icon appears next to the clock on the taskbar.
On computers running Windows 95 or later, you can double-click the Task
Scheduler icon on the taskbar to open Task Scheduler. On computers running
either Windows 95 or later or Windows NT, you can also open Task Scheduler
by double-clicking My Computer and then double-clicking the Scheduled Tasks
folder.
Opening Task Scheduler enables you to:
a. Schedule a task to run daily,
weekly, monthly, or at certain times, such as when the computer starts
or is idle.
b. Change the schedule for or turn off
an existing task.
c. Customize how a task will run at
its scheduled time.
Overview of Scheduler
The installation of the Offline Browsing Pack, a component of Internet
Explorer 5, on a computer running Windows NT 4.0 replaces the
Schedule service with the Task Scheduler service. This article explains
the differences between the two services.
Prior to Task Scheduler, tasks needed to be configured using the AT
command and the Schedule service. By default, the Schedule service
is installed with System credentials in the "logon as" section of the startup
properties for the service. The "logon as" credentials needed to be changed
to a valid domain/local account if the command required domain/user authentication
to run. The "logon as" field is not available for the Task Scheduler
service.
These credentials do not need to be configured for the Task Scheduler
service because each individual task can be configured with unique credentials
for the privileges required. When the task is originally created,
the user is prompted for the credentials required for this command. After
the task has been created, the credentials can be changed in the "run as"
field on the task properties.
Using Task Scheduler with the Windows 95 Plus! System
Agent
Windows
95 Plus! contains a task-scheduling tool named System Agent. If Plus!
was installed on your computer when you installed
Internet Explorer, System Agent was automatically upgraded to Task
Scheduler. All tasks previously scheduled by using System Agent were converted
to Task Scheduler tasks and appear on your Task Scheduler task list.
Task Scheduler works with Plus! applications in the same way that System
Agent did; for example, once you upgrade or compress a drive using DriveSpace
3, Task Scheduler schedules Compression Agent to run at regular intervals,
just as System Agent automatically scheduled Compression Agent in the same
situation.
Although System Agent has been upgraded to Task Scheduler, Help for
System Agent still appears in your Windows 95 Plus! Help file. This Help
is no longer valid.
Using the AT command on Windows NT
If your computer runs Windows NT, you can also use the AT command to
schedule tasks automatically. Task Scheduler is not the same as the
AT command, but the two work together. When you schedule a task by using
the AT command, it appears in the list of tasks in the Task Scheduler window.
You can use Task Scheduler to modify the properties of a task scheduled
by using the AT command. However, if you do, you must continue to use Task
Scheduler to access the task. You will no longer be able to access it by
using the AT command. To specify the user account to be used to run
tasks scheduled by the AT command:
a. Double-click My Computer
b. Double-click the Scheduled
Tasks folder
c. On the Advanced menu, click
AT Service Account.
