Fix Error Task Scheduler service is not available in Windows 10 / 11 (Solved)

Windows 10 users are targeted by a number of errors and issues. The latest in the long list of Windows 11 or Windows 10 errors is Task Scheduler is not available. When this error appears, clicking on OK or closing it doesn’t work at all. The error shows up again, and makes the Task Scheduler freeze. If you get stuck in such situation, the best way to close it is through Task Manager. But it will still show again up after some time. Many Windows 10 users are affected by this error. If you are also one of them, there is nothing to worry about anymore. The reason behind this error could be anything from the corrupt registry to corrupted Task Scheduler tree cache. We will try to fix this issue using different methods. Simply perform them one by one, until the issue is fixed.


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Fix 1 –  Make Changes in Task Conditions

In this method, we will make some changes in the properties of your task. The “task” here can be any task of yours. Follow the steps to perform the method.

 

Step 1 –  Search Task Scheduler in Search box of Windows PC and click on the search result to open task scheduler.

Task Scheduler Min

 

 

Step 2- In the Task Scheduler window, Locate your task and then simply right-click on your task and click on Properties.

 

Task Properties 1 Min

 

Step 3 – In the Properties window, go to Conditions tab. Here, you need to Uncheck  the box beside Start only if the following network connection is available. It will be located under Network. Also, don’t forget to set it to Any connection. After that, click on OK.

 

Task Scheduler Condition Min

 

Step 4 – Now you need to restart your computer. After the restart, the error will be fixed.

This should fix the error. If you are still facing the same problems using Task Scheduler, follow the next method.

Fix 2 – Editing Registry Values

1 – Search Registry editor in Windows search box.


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2 – Now, click on on Registry editor to open it.

Registry Editor Search Min


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3 – Now, browse to the path given below in Registry editor.

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\TimeBrokerSvc

4 – Now, in the right side double click on Start.

5 – Change the value to 3 and click OK.

 

Start Timebroker Edit Registry Min

 

6 – Restart PC.

Fix 3 –  Change the name of the task being imported

Many users said that, this error happened when they tried to import a tak which has the same name of an already deleted task. They said, this error got fixed when they changed the name of the task being imported. You can also try changing the name of the task being imported to a new one.

Fix 4 – Start Task Scheduler Service Manually

The best method to fix the issue is by starting the Task Scheduler service manually. A number of Windows 10 users have profited from this method. Follow the steps to perform this method.

 

Step 1 – Search services in windows search box and click on it.

Open Services App

 

Step 2 – The last step will open Services. In the Services window, look for Task Scheduler service and right-click on it. Select Properties from the menu that opens.

Task Scheduler Properties

 

Step 3 – In the Properties window, check the Startup type and make sure it is selected as Automatic. Also, check Service Status. It should be Running. If it is not Running, then click on the Start button. After that, click on OK.

Task Scheduler Properties 1

 

Step 4. Now restart your computer.

 

This should fix the issue. If you are still getting the same error, try the next method.

Fix 5 – Fix the Registry

In the second method, we will try to solve the issue by fixing the Registry. Many users have fixed the error using this method. Follow the steps to perform this method.

 

 

Step 1. Open Run. To open Run, right-click on the Start menu button and select Run.

Run Run

 

Step 2. The last step will open the Run window. Now, we have to open Registry Editor. To do that, type regedit in Run window and click on OK. When asked for confirmation, click on Yes.

 

Run Regedit

Step 3. The last step will open Registry Editor. Here, you have to follow the path mentioned below on the left side of Registry Editor.

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Schedule

 Task Scheduler Regedit

 

Step 4. After selecting Schedule on the left side, look for Start key on the right side of the Registry Editor.

Task Scheduler Regedit Schedule Start

 

Step 5. If you were unable to find Start key, simply right-click on the right side of Registry Editor, go to New and select DWORD (32-bit) Value.

Regedit New Dword 32 Bit Value

 

Step 6. The last step will create a New Value#1 key. Now, rename the New Value#1 to Start and then open Modify by double clicking on it. Here, under Value data type 2 and click on OK.

Regedit New Dword 32 Bit Value 1

 

Step 7. After the last step, close the Registry Editor. Now you just need to restart your computer.

 

After restarting the computer, check if this has fixed the issue or not. If the problem still persists, perform the next method.

Fix 6 – Find and Delete the Corrupted Task Scheduler Tree Cache

In this method, we will find the corrupted Task Scheduler tree cache and delete it. Follow the steps closely to perform this method.

Step 1. Open Run. To open Run, right-click on the Start menu button and select Run.

Run Run

 

Step 2. The last step will open the Run window. Now, we have to open Registry Editor. To do that, type regedit in Run window and click on OK. When asked for confirmation, click on Yes.

Run Regedit

 

Step 3. The last step will open Registry Editor. Here, you have to follow the path mentioned below on the left side of Registry Editor.

HKEY_LOCAL_MACHINE\SOFTWARE \Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Tree

 Task Scheduler Regedit Tree

 

Step 4. On the left side of the Registry Editor, right-click on Tree and click on Rename. Rename it to Tree.old.

Tree.old 1


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Note: -If you can not edit Tree , Read this article to get full permission

Step 5. Now, open the Task Scheduler and check if this has solved the problem. If you are no more getting the error message, this means the Tree is corrupted. Now we have to find out which task is corrupted in it.

 

Step 6. First, you need to rename Tree.old back to Tree. To do that, right-click on Tree.old and select Rename. Now rename it to Tree.

Rename Tree

Step 7. Expand Tree. Here you will see a number of scheduled tasks. Now, you have to rename the first task and add “.old” at the end of its name (very much like Step 4). For example, if the first task is KMSAuto, then right-click on it and select Rename. Now rename it to KMSAuto.old.

Kmsauto.old 1

 

Step 8. After performing the last step, open Task Scheduler and check if you are still getting the error. If you are still getting the error, then remove the “.old” from the task you renamed in the last step.

 

Step 9. Now, perform the Step 7 with the next task and then repeat Step 8. Keep doing this with every task, until the error message stops showing in the Task Scheduler.

And when you don’t get the error on Task Scheduler, this means the last task you renamed is the corrupted one. Now, simply delete the corrupted task by right-clicking on it and selecting Delete.

Delete Registry

 

This should fix the problem.

 

We hope you were able to fix the error using our methods. If you solved the problem using some other method, or if you have any questions related to this issue, please mention them below in comments.

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5 thoughts on “Fix Error Task Scheduler service is not available in Windows 10 / 11 (Solved)”

  1. My intention was to synchronize my windows time on every login
    easy way: just set up a task in the scheduler by edit “ForceTimeSynchronize”.
    After clicking OK it gave a message something like “task scheduler service not running .. blahblah” and nothin’ changed at all.
    (even though the service was running)

    So I tried everything in this article, nohting worked for me.
    My solution (scheduled tasks):
    I deletet the pre- “User defined” Trigger and set my own.
    After this I was able to save and use, for my case, “ForceTimeSynchronize” task.

    I written the comment for other people facing a similar problem 🙂
    kind regards

  2. Can’t rename/delete Tree in registry, also acquiring the ownership and control of the “Tree” object in Regedit > Authorizations. Even starting in safe mode
    Invalid/outdated article.

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