Fix: TaskSchedulerHelper.dll is missing at startup

Some users are reporting receiving a RunDLL message signaling that “TaskSchedulerHelper.dll is missing” at every single startup. Most of the time, this behavior is triggered by a file belonging to a 3rd party app that got corrupted or improperly removed.

From our investigations, it seems like TaskSchedulerHelper.dll is a Dynamic Link Library (DLL) file belonging to the Auslogics software – a 3rd party utility. Other users are reporting that in their case the TaskSchedulerHelper.dll was associated with a Nvidia key. However, it’s entirely possible that other applications (or games) will make use of this DLL file.

If you’re currently dealing with the “TaskSchedulerHelper.dll is missing” error at every startup, the following methods might help. Below you have a collection of methods that other users in a similar situation have used to resolve the issue. Please follow whichever methods seem more approachable or follow them both until you find a fix that eliminates the TaskSchedulerHelper.dll error message.

Method 1: Using AutoRuns to remove the startup program responsible

The ideal tactic capable of dealing of a Run DLL error triggered at startup is to use Autoruns – a software designed to remove run, runonce, registry keys and startup folders.

Because this error is triggered at every startup, it’s very likely that this behavior is triggered by a scheduled task left behind by an improper installation or by some form of software corruption.

Follow the guide directly below to use Autoruns to remove the startup key, runonce or run key responsible for the “TaskSchedulerHelper.dll is missing” error:

1. Visit this official download link (here) and click the Download Autoruns and Autorunsc button to download the utility’s archive. Once the archive is downloaded, use WinRar, WinZip or a different decompression software to extract the contents of the archive somewhere accessible.
   
2. Open the utility’s folder and open the Autoruns executable. When the Autoruns window appears, don’t do anything else until the Everything list is fully populated with startup items.
3. Once you have the list in full, press Ctrl + F to open up the search function. Next, type “TaskSchedulerHelper.dll” in the search box associated with Find what, then hit the Find Next button.
   
4. Next, right-click on the first highlighted occurence (with blue) and select Delete to remove the startup item (or registry key). Once the first occurence is dealt with, bring up the search function again and click the Find Next button again and repeat the same procedure until the list is free of entries that contain the TaskSchedulerHelper.dll.
5. Once you manage to delete all the items, close Autoruns and restart your computer. At the next startup, see whether you encounter the same “TaskSchedulerHelper.dll is missing” error. If you don’t, you just managed to resolve the issue.

If you still encounter the “TaskSchedulerHelper.dll is missing” error at every startup, continue with Method 2.

Method 2: Using CCleaner to remove the startup program responsible

If Method 1 was inefficient in allowing you to get rid of the “TaskSchedulerHelper.dll is missing” error, let’s see if we manage to do it via CCleaner.

CCleaner is a utility capable of removing leftover files that might be causing a Run DLL error of this kind. It has a neat option that will allow us to look at the startup programs and figure out whether your computer has a Startup program that is scheduled to call for the TaskSchedulerHelper.dll file and trigger the error.

Follow the guide down below on using CCleaner to remove startup programs that contain the TaskSchedulerHelper.dll file. We’ll then use the same software to clean any junk & registry keys which might trigger this behavior.

1. Visit this link (here) and download the free version of CCleaner. Once the installer is downloaded, open it and follow the on-screen prompts to install the software on your system.
   
2. Open CCleaner and go to Tools > Startup. Then, start by inspecting the Windows tab for any key which contains the TaskSchedulerHelper.dll under FIle. If you fain any occurence, click on it once to select it and choose Delete.
   
3. Repeat the same procedure with any keys found under the Scheduled Tasks tab and the Context Menu tab.
4. Once all the startup items that might be responsible for the Run DLL error have been removed, click on Cleaner and click on Run Cleaner to run the software with the default preferences.
   
5. Once the Cleaner chore is complete, click on Registry, make sure all sub-items of Registry Cleaner are selected and click on Scan for Issues. Once the analysis is complete, click on Fix selected Issues.
   Note: When asked if you want to backup the changes to the registry, it’s advisable to click Yes.
6. Once the process is complete, close CCleaner and restart your computer. At the next startup, the “TaskSchedulerHelper.dll is missing” error Run DLL error should no longer appear.