Windows 10: Executable creating a scheduled task behaves unexpectedly when running with SYSTEM privileges.

I have a cpp program which creates a task that runs a command to delete a directory. The task has a few seconds delay after registration. When I run as administrator everything goes as usual, but when I create an elevated shell using psexec -i -s cmd and attempt to run the program the task loses its delay, and any record of it in registry or the task scheduler is gone like it never existed. When I run directly from psexec using psexec -i -s something.exe I get an access denied error. The task does execute though and does what it is supposed to and the directory is deleted. Tested on both windo

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Scheduled tasks run with elevated privileges can't access stored Windows credentials

It seems that after Creators update scheduled tasks run with elevated privileges ('run with highest privileges' option) can't access stored Windows credentials. Is that a bug or an intentional change and is there a recommended workaround?

Here's one way to reproduce the behaviour:

• Start Credential Manger and add some Windows share credentials.
• In a console window type 'cmdkey /list', which should list the added credentials
• Create a task in a task manager:
  • Trigger: on user logon
  • Action: run cmd.exe
  • Tick the 'run with highest privileges' option
• Reboot the machine and log in
• In the console window (let's call it 'console 1') opened from the scheduled task type 'cmdkey /list'. This most likely won't display the credentials added in step 1 and properly listed in step 2. ->
  This looks like a bug
• Now, without closing 'console 1' open another console window as an administrator (let's call it 'console 2') and type 'cmdkey /list'. This will properly list credentials added in step 1.
• Switch to 'console 1' and type 'cmdkey /list' again. This time the credentials are listed properly, unlike in step 5. It looks like an access to Windows credentials was somehow 'unlocked' by step 6.

 

Task scheduler

Hi,

Thank you for posting your query in Microsoft Community.

What error message you're getting while using Task Scheduler?

Suggest you try the below mentioned steps to fix any issue with corrupted system files:

• 
  Press CTRL+Shift+ESC to open Task Manager.
  
• 
  Click File > Run New Task
  
• 
  Make sure you have a check mark beside “Create this task with administrative privileges”
  
• 
  Type CMD
  
• 
  Type or copy/paste the following commands at the CMD prompt:
  
  dism /online /cleanup-image /restorehealth
  
  sfc /scannnow
  

Reboot the system and check if the issue still occurs. If the problem still persist, try to check the issue by creating other User Profile to see if problem still arises.

Hope this will address your query.

 

Window's Task Scheduler Not Running

Hi,

To assist you better, kindly provide us more details by answering the following questions:

• Have you tried recreating the task? If so, are you getting the same issue?
• Have you tried creating a new task?

Meanwhile, we suggest that you ensure that the Task Scheduler is running. You can verify if the service is running by following these steps:

• Press Windows key + R on your keyboard.
• Type services.msc and hit Enter.
• Under Services (Local), make sure that the Task Scheduler service's status is
  Started or Enabled.

Should you need further assistance, feel free to get back to us.