- Task Manager (Windows)
- Windows service
- PCMedia AntiVirus
- Apache Mesos
- Windows Task Scheduler
- Scheduling (computing)
- Task Manager (Windows)
- List of job scheduler software
- Job scheduler
- Task (computing)
- Comparison of defragmentation software
- Cooperative multitasking
- Preemption (computing)
- Cron
- Task - Create to Run a Program at Startup and Log On
- Task Scheduler - Create Task to Display a Message Reminder
- Task Scheduler - Create New Task | Tutorials - Windows 7 Help …
- Questions about "Idle" conditions in built-in Task Scheduler
- Task scheduler: trigger on screensaver event possible?
- Task scheduler program start minimized - Windows 7 Forums
- How to use Task Scheduler to close a program? - Windows 7 …
- Task Scheduler wait for action to complete - Windows 7 Forums
- Task Scheduler - Put Computer into Standby Mode | Tutorials
- How to Schedule Folder Content Deleting Task - Windows 7 Forums
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Task Scheduler (formerly Scheduled Tasks) is a job scheduler in Microsoft Windows that launches computer programs or scripts at pre-defined times or after specified time intervals. Microsoft introduced this component in the Microsoft Plus! for Windows 95 as System Agent. Its core component is an eponymous Windows service. The Windows Task Scheduler infrastructure is the basis for the Windows PowerShell scheduled jobs feature introduced with PowerShell v3.
Task Scheduler can be compared to cron or anacron on Unix-like operating systems. This service should not be confused with the scheduler, which is a core component of the OS kernel that allocates CPU resources to processes already running.
Versions
= Task Scheduler 1.0
=Task Scheduler 1.0 is included with Windows NT 4.0 (with Internet Explorer 4.0 or later), Windows 2000, Windows XP and Windows Server 2003. It runs as a Windows Service, and the task definitions and schedules are stored in binary .job files. Tasks are manipulated directly by manipulating the .job files. Each task corresponds to single action. On Windows 95 (with Internet Explorer 4.0 or later), Windows 98 and Windows Me, the Task Scheduler runs as an ordinary program, mstask.exe. It also displays a status icon in the notification area on Windows 95 and Windows 98 and runs as a hidden service on Windows Me, but can be made to show a tray icon. Computer programs and scripts can access the service through six COM interfaces. Microsoft provides a scheduling agent DLL, a sample VBScript and a configuration file to automate Task Scheduler.
In addition to the graphical user interface for Task Scheduler in Control Panel, Windows provides two command-line tools for managing scheduled task: at.exe (deprecated) and schtasks.exe. However, at.exe cannot access tasks created or modified by Control Panel or schtasks.exe. Also, tasks created with at.exe are not interactive by default; interactivity needs to be explicitly requested. The binary ".job" files which the AT command produces are stored in the %WINDIR%\Tasks directory.
= Task Scheduler 2.0
=Task Scheduler 2.0 was introduced with Windows Vista and included in Windows Server 2008 as well. The redesigned Task Scheduler user interface is now based on Management Console. In addition to running tasks on scheduled times or specified intervals, Task Scheduler 2.0 also supports calendar and event-based triggers, such as starting a task when a particular event is logged to the event log, or when a combination of events has occurred. Also, several tasks that are triggered by the same event can be configured to run either simultaneously or in a pre-determined chained sequence of a series of actions, instead of having to create multiple scheduled tasks. Tasks can also be configured to run based on system status such as being idle for a pre-configured amount of time, on startup, logoff, or only during or for a specified time. XPath expressions can be used to filter events from the Windows Event Log. Tasks can also be delayed for a specified time after the triggering event has occurred, or repeat until some other event occurs. Actions that need to be done if a task fails can also be configured. The actions that can be taken in response to triggers, both event-based as well as time-based, not only include launching applications but also take a number of custom actions. Task Scheduler includes a number of actions built-in, spanning a number of applications; including send an e-mail, show a message box, or fire a COM handler when it is triggered. Custom actions can also be specified using the Task Scheduler API. Task Scheduler keeps a history log of all execution details of all the tasks. Windows Vista uses Task Scheduler 2.0 to run various system-level tasks; consequently, the Task Scheduler service can no longer be disabled (except with a simple registry tweak).
Task Scheduler 2.0 exposes an API to allow computer programs and scripts create tasks. It consists of 42 COM interfaces. The Windows API does not, however, include a managed wrapper for Task Scheduler though an open source implementation exists. The job files for Task Scheduler 2.0 are XML-based, and are human-readable, conforming to the Task Scheduler Schema.
Other features
New security features, including using Credential Manager to passwords for tasks on workgroup computers and using Active Directory for task credentials on domain-joined computers so that they cannot be retrieved easily. Also, scheduled tasks are executed in their own session, instead of the same session as system services or the current user.
Ability to wake up a machine remotely or using BIOS timer from sleep or hibernation to execute a scheduled task or run a previously scheduled task after a machine gets turned on.
Ability to attach tasks to events directly from the Event Viewer.
Tasks
The Task Scheduler service works by managing Tasks; Task refers to the action (or actions) taken in response to trigger(s). A task is defined by associating a set of actions, which can include launching an application or taking some custom-defined action, to a set of triggers, which can either be time-based or event-based. In addition, a task also can contain metadata that defines how the actions will be executed, such as the security context the task will run in. Tasks are serialized to .job files and are stored in the special folder titled Task Folder, organized in subdirectories. Programmatically, the task folder is accessed using the ITaskFolder interface or the TaskFolder scripting object and individual tasks using the IRegisteredTask interface or RegisteredTask object.
Column 'Last Result'
The Last Result column displays a completion code. The common codes for scheduled tasks are:
Bugs
On Windows 2000 and Windows XP, when a computer is prepared for disk imaging with the sysprep utility, it cannot run tasks configured to run in the context of the SYSTEM account. Sysprep changes the security identifier (SID) to avoid duplication but does not update scheduled tasks to use the new SID. Consequently, the affected tasks fail to run. There is no solution for this problem but one may reschedule the affected tasks to work around the issue.
On Windows Vista or Windows Server 2008, the next execution time displayed in Task Scheduler may be wrong. Microsoft issued a hotfix to remedy this issue.
See also
cron, job scheduler for Unix-like operating systems
References
Further reading
Leonhard, Woody; Rusen, Ciprian (2021). Windows 10 All-in-One For Dummies. John Wiley & Sons. ISBN 978-1119680574.
Knittel, Brian; McFedries, Paul (2014). Windows 8.1 in Depth. Que Publishing. ISBN 978-0789752819.
Bott, Ed; Siechert, Carl; Stinson, Craig (2009). Windows 7 Inside Out. Pearson Education. ISBN 978-0735636842.
Ruest, Danielle; Ruest, Nelson (2008). Microsoft Windows Server 2008: The Complete Reference. McGraw-Hill Education. ISBN 978-0071596466.
Cowart, Robert; Knittel, Brian (2008). Special Edition Using Microsoft Windows Vista. Que. ISBN 978-0789737816.
External links
Task Scheduler on MSDN
The Log File in the Task Scheduler May Be Incorrectly Formatted and Difficult to Read - Archived October 16, 2007, at the Wayback Machine
Unable to Delete Text in the Task Scheduler Log File
Task Scheduler Service Does Not Start
Scheduled Program Does Not Start in Task Scheduler - Archived August 21, 2006, at the Wayback Machine
Cannot Disable Task Scheduler
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Windows Task Scheduler - Task Scheduler - Windows Scheduler
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Daftar Isi
Task - Create to Run a Program at Startup and Log On
Apr 1, 2011 · This will show you how to create a task in Windows 7 Task Scheduler to run a program of your choice at the Startup and/or Log On of any user account. Note By default, you …
Task Scheduler - Create Task to Display a Message Reminder
Oct 4, 2012 · How to Create Automated Task that Runs at Set Time in Windows 7 A very handy feature within Vista, Windows Server 2008 & now Windows 7 is the Task Scheduler. This app …
Task Scheduler - Create New Task | Tutorials - Windows 7 Help …
Feb 15, 2010 · A very handy feature within Vista, Windows Server 2008 & now Windows 7 is the Task Scheduler. This app will allow the automated running of files and programs at a user …
Questions about "Idle" conditions in built-in Task Scheduler
Mar 11, 2019 · Hi, I'm having a problem trying to automatically run a basic .bat file in task scheduler in windows 7 64-bit. I have more complicated .bat files to schedule but I can't get a …
Task scheduler: trigger on screensaver event possible?
Jul 13, 2012 · OK I know i've bombarded the forums lately with a couple threads all somewhat related. Point of this thread -- how to correctly set the idle trigger in windows task scheduler. …
Task scheduler program start minimized - Windows 7 Forums
Sep 22, 2012 · Windows 10 Pro x64, Windows 8.1 Pro x64, Windows 7 Ultimate x64 SP1, New 22 Sep 2012 #2 Add /t to the arguments block under actions for the program in the task scheduler.
How to use Task Scheduler to close a program? - Windows 7 …
Jan 16, 2014 · Hello all, I just discovered the task scheduler and I am using it to start programs at logon, like eraser. The only problem is I would like to start them minimized and I can't quite …
Task Scheduler wait for action to complete - Windows 7 Forums
Jun 7, 2010 · Hi-I am using Task Scheduler to run an .exe and then a .bat file at a scheduled time each day. However, the run time for the .exe process varies between seconds and hours and I …
Task Scheduler - Put Computer into Standby Mode | Tutorials
Oct 29, 2013 · Windows 7 Task Scheduler sleep command. Well, I figured it out. To put a Windows 7 computer to sleep at a specified time using the Task Scheduler is a two step …
How to Schedule Folder Content Deleting Task - Windows 7 Forums
Jun 13, 2012 · Dear All, I am facing issue regarding Task Schedule, I have created a task which runs first time perfectly but it remains in running condition. I am unable to understand why it …