When you launch a program, the app uses the NotificationController.dll file to find the necessary instructions. The file is usually stored on your computer: the program’s installation folder and the system folder, ‘System 32’ or ‘SysWOW64’.
The NotificationController.dll missing error appears when Windows fails to find the file in either of these two places. When your computer fails to grab instructions from the NotificationController.dll, it fails to launch the program.
You can do a few things to resolve the NotificationController.dll missing error message on your computer. Here’s what you can do.
1. Use a DLL Fixer Software
Many free DLL Fixer softwares programs available for Windows can fix all missing DLL errors, including the NotificationController.dll. These DLL repair tools fix the DLL Files that are:
- Broken
- Corrupted
- Missing or Not Found
We have already shared a list of the best DLL Fixer softwares. You need to go through that article and pick the tool that suits your needs and budget.
2. Update your Windows PC
Updating the Windows operating system is the next best option to resolve all missing DLL errors.
1. Click on the Windows Start button and select Settings.
2. Switch to the Windows Update.
3. Click Check for Updates.
4. Windows will automatically find all pending updates and will install them.
3. Reinstall the Problematic App
NotificationController.dll missing error can be linked to a faulty app installation or corrupted files. You can reinstall the problematic app to resolve all app installation problems.
1. Click on Windows search and type in Control Panel.
2. Open the Control Panel app from the list and select Uninstall a program.
3. Right-click on the program showing you the error and select Uninstall.
4. Run the System File Checker Tool
The System File Checker (SFC) tool is one of the best ways to deal with corrupted system files. It can potentially fix most Windows problems, including missing DLL errors.
1. Click on Windows search and type in CMD.
2. Right-click on the Command Prompt and select Run as Administrator.
3. Type sfc /scannow and press Enter.
You must wait until the SFC command scans and repairs all corrupted system files.
5. Perform a System Restore
If none of the methods have worked, you can roll back your Windows to a point where your computer is free from any errors. However, you can only perform a System Restore if the Restore points were enabled previously.
- Open the Recovery app from the Windows Search.
3. On the Restore system files and settings window, click Next.
4. Select your ideal restore point and click Next.
5. On the confirmation window, click Finish.
6. Reset Your Windows PC
If nothing worked for you to fix the NotificationController.dll missing error, your last resort is to perform a factory reset. Make sure to back up your important files and folders before you reset your Windows PC.
1. Click on Windows Search and select Settings.
2. Switch to Windows Update.
3. Click on Advanced Options.
3. Click Recovery.
4. Click on Reset PC.
5. Select Keep My Files.
6. Select Cloud Download.
Follow the on-screen instructions to factory reset your Windows PC. After the reset, install the app again; you won’t get the NotificationController.dll missing error this time.
Also read: Download Windows 11 ISO File 64-bit
These are the best things you can do to resolve NotificationController.dll missing errors on a Windows computer. We are sure all these methods would have fixed the error message.


















