People easily run into the DLL errors when they attempt to access some applications.
This post onMiniToolwill teach you the ways to fix the NotificationController.dll error.
What Is NotificationController.dll Error?

NotificationController.dll is an essential part for the normal operation of system and applications.
It is a Windows operating system file located in the System32 folder.
When this file gets loaded, some other related files will ensue after it.
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So the NotificationController.dll error can happen, provided one of these files get corrupted or missing.
There are many reasons for this happening and your Windows may go crashed.
Therefore, we highly recommended that you should back up your important data regularly in case of unrecoverable loss.

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How to Fix the NotificationController.dll Error?
Step 1: Go toStart > controls > Apps > Apps & features.
Step 2: Scroll down from the right panel to locate and choose the app and chooseUninstall.
Step 3: ClickUninstallagain to affirm the choice.
Step 1: InputCommand PromptinSearchand chooseRun as administrator.
Step 2: When the window comes up, typesfc /scannowand pressEnterto execute the command.
Step 1: Go toStart > options > Update & Security > Windows Update.
Step 2: ClickCheck for updatesfrom the right panel and the system will start downloading and installing available updates.
For detailed steps, you’re free to do as follow.
OpenCommand Promptwith admin right and execute the following command regsvr32 notificationcontroller.dll.
But note that this method is only available for those who havecreated a system restore pointbefore.
Step 1: TypeControl Panelin Search and open it.
Step 2: ChangeView by:toSmall iconsand clickRecovery > Open System Restore.
Are you still troubled by the issue restore point cannot be created?
This post shows 6 solutions to solve the problem restore point could not be created.
Bottom Line:
This article has given you some available fixes for the NotificationController.dll error.