Updating a Scheduled Task's Credentials The Task Scheduler service in Windows Vista and Windows Server 2. However, the OSs' Schtasks tool, which ostensibly lets you manage scheduled tasks from the command line, hasn't kept up. You can no longer use the Schtasks command to update a scheduled task's stored credentials, as you could in earlier versions. This issue becomes a significant problem if the password changes for an account that's used to run numerous scheduled tasks. In this article, I'll present a Windows Power. Shell script, Set- Scheduled.

Updating a Scheduled Task's Credentials The Task Scheduler service in Windows Vista and Windows Server 2. However, the OSs' Schtasks tool, which ostensibly lets you manage scheduled tasks from the command line, hasn't kept up. You can no longer use the Schtasks command to update a scheduled task's stored credentials, as you could in earlier versions. This issue becomes a significant problem if the password changes for an account that's used to run numerous scheduled tasks. In this article, I'll present a Windows Power. Shell script, Set- Scheduled.

Task. Credential. For example, you can send an email message or display a message box in addition to running a program. You also have more options for when a task should execute: You can specify a task to execute when a specific event appears in the event log, for example. Each task also has a separate History tab in the Task Scheduler console. These are great improvements to a core Windows system service. One of the first things I noticed about the new service is that you can't use the Task Scheduler console to rename a scheduled task.

I rectified this shortcoming by writing a Power. Shell script that can rename a scheduled task on the newer OSs (see . The next problem I noticed was that there was no good way to get a list of scheduled tasks on one or more computers; as I wrote in . When you attempt to do so, the command simply outputs the message ERROR: The parameter is incorrect. Figure 1 shows my attempt to set the stored credentials for a scheduled task on a Windows 7 machine. This command syntax works fine on earlier versions (Figure 2 shows how I successfully used the command on a Windows XP system).

Figure 1: Using Schtasks /change in Windows 7   Figure 2: Using Schtasks /change in Windows XP It turns out that if you use Schtasks with the /create parameter to create the scheduled task, then you can use Schtasks with the /change parameter to update a task's stored credentials. However, you can't use Schtasks /change to set the stored credentials for tasks that were created using the Task Scheduler console, which is likely how the vast majority of administrators create scheduled tasks. This limitation has the potential to be time consuming for many organizations. Setting stored task credentials one at a time in the Task Scheduler console becomes incredibly inefficient as the number of scheduled tasks increases. The script's command- line syntax is as follows: Set- Scheduled. Task. Credential - Task. Name < String.

However, the OSs' Schtasks tool. Most TaskSchedulerHelper.dll errors are related to missing or corrupt TaskSchedulerHelper.dll files. Here are the top five most common TaskSchedulerHelper.dll errors. BITCOMET CHANGELOG v1.45 2017.1.17 GUI Improved: support login account using email GUI Improved: client IP address moved from status bar to context menu.

You can specify more than one task name as an array, but you can't use wildcard characters. You can omit the - Task. Name parameter name if the parameter's argument (i. Because the Task Scheduler service (on Vista and later) supports task folders, you must specify the full path to the task name (e. If you omit a folder name, the script assumes that the task lives in the root folder (i.

This parameter also supports pipeline input. The - Task. Credential parameter is optional; if you don't specify it, then the script prompts for credentials to use. The - Task. Credential parameter is analogous to the Schtasks /change /RU and /RP parameters.

Use this parameter to specify a PSCredential object that contains the credentials that are used to connect to the Task Scheduler service. You can use the syntax - Connection.

Credential (Get- Credential) to prompt for the PSCredential parameter. The - Connection. Credential parameter is analogous to the Schtasks /change /U and /P parameters. To prevent errors, the script checks the Task Scheduler service version.

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If the service version is too old, then the script outputs an error. This shouldn't be a big problem because you can still use Schtasks /change on older platforms. That is, if the task isn't configured with stored credentials, then the script can't set the credentials. These objects don't support encrypted credentials internally, so the script must temporarily retrieve a PSCredential object's passwords as plaintext when using a password with the scripting objects. These passwords aren't sent in plaintext over the network, but they're temporarily decrypted in memory when the script is running.

Additional tasks in the Task Scheduler window are organized by owner. You see a folder for Microsoft, which contains subfolders for Windows and Windows Defender.

Thus, there's a remote possibility that if the computer running the script crashes, the computer's memory dump information might contain a plaintext copy of a password. Note that this example omits the - Task. Name parameter name. The script prompts for the stored credentials to use.

The script prompts for which credentials to use. If you run this command, you'll notice that you'll be prompted twice for task credentials; this is because the For. Each- Object cmdlet runs the script twice (once for each computer name). To work around this annoyance, create a PSCredential object first, and then use it with the - Task. Credential parameter: PS C: \> $cred = Get- Credential . The first prompt is for the credentials for the - Connection. Credential parameter, and the second prompt is for the credentials for the scheduled task.

Of course, you can avoid the prompts by creating PSCredential objects before running the script. With the Set- Scheduled. Task. Credential.