QuickBooks Event ID 4 error appears when a Windows component .NET framework isn’t functioning accurately or when you start the QBs integration manager. Accessing it triggers this QuickBooks error. Reasons for the Event ID 4 error can be damage to Windows components. It is a Windows-specific error. It will impact the performance of QuickBooks. You can see many error messages, such as:

An unexpected error has occurred in the “QuickBooks”: mainframe must be already created by now as this dll is demand loaded.

If you're unsure about handling the troubleshooting steps yourself, just call our 1.855.738.2784 to reach our QuickBooks experts for assistance.

Reasons For Integration Manager Error in QuickBooks?

Possible triggers of event ID log 4 error are as follows:

1. Damaged Windows component.
2. Corrupt Installation files.
3. Data damage.

Fixing Event ID 4 error in QuickBooks

If you want to resolve the event ID 4 error, follow these steps.

Solution 1: Fix.NET Framework

1. Exit all the active programs.
2. Terminate the QuickBooks processes from the Task Manager. 
3. Press Ctrl + Shift + Delete keys.
4. Launch the Task Manager.
5. Go to the Processes tab.
6. Locate QBW32.exe, QBupdate.exe, and QBDBMgrn.exe services.
7. Right-click each of them.
8. Select the End Task/Process option.
9. Exit other running apps.
10. Go to the Windows Start menu.
11. Open the Control Panel.
12. Tap Programs and Features.
13. Click the Uninstall a Program.
14. Select Turn Windows Features On or Off.
15. Look for .NET Framework.
16. Verify the settings for both .NET Framework.

Read More: How To Fix QuickBooks Won't Open Without Update

Solution 2: Reinstall QuickBooks

1. Click the Windows icon.
2. Access the Start menu.
3. Type Control Panel in the search field.
4. Open it.
5. Go to the Programs and Features tab.
6. Select the Uninstall a Program option.
7. View the menu.
8. Select QuickBooks Desktop.
9. Click the Remove a Program option.
10. Delete the app from the system.
11. Once done, use the clean install tool.
12. Now, reinstall QuickBooks.
13. Use the downloaded file.
14. Accept the terms and conditions.
15. Enter the necessary details.
16. Install QuickBooks successfully.
17. After that, open it.

Solution 3: Run QB Install Diagnostic

Step 1: Download Tools Hub

1. Close QuickBooks.
2. Download QB Tool Hub. 
3. Save the file.
4. Open the QuickBooksToolHub.exe file.
5. Follow the on-screen steps.
6. Install the tool.
7. Agree to the terms and conditions.
8. When done, double-click on its icon.
9. Open the Tool Hub.

Step 2: Run QB Install Diagnostic

1. Open the QB Tool Hub.
2. Select Installation Issues.
3. Select QuickBooks Install Diagnostic Tool.
4. The tool will start running.
5. Wait for it. It will take 20 minutes.
6. When done, restart your computer.
7. Open QuickBooks Desktop.
8. Access your data file.
9. Update QuickBooks.

Conclusion 

In this blog post, we talked about what causes the QuickBooks Event ID 4 error and how to fix it. Ensure following the steps correctly.

Recommended To Read: How To Resolve QuickBooks Clean Install Tool