How to Resolve the 0x80040155 Interface Not Registered Error in Outlook, Excel, and More
Key Notes
- Repairing or resetting Office applications can resolve corrupted file issues.
- Reinstalling Microsoft Office ensures that all necessary files are intact.
- Disabling Office add-ins may help mitigate functionality issues.
Resolving the 0x80040155 Interface Not Registered Error in Microsoft Office
The 0x80040155 Interface Not Registered error can disrupt your workflow in various Microsoft Office applications like Outlook and Excel. Understanding its causes and knowing how to fix it is crucial for a seamless experience.
Steps to Fix the 0x80040155 Interface Not Registered Error
Step 1: Repair or Reset Microsoft Office
Corrupted or missing files can lead to the 0x80040155 error. Repairing or resetting Office can rectify these issues.
- Open Windows Search and type Control Panel, then press Enter.
- Select Programs > Programs and Features from the Control Panel.
- Locate Microsoft Office, click on it, and select Change.
Pro Tip: If prompted to choose an option, opt for Online Repair for a thorough fix.
Step 2: Reinstall Microsoft Office Using Default Settings
To ensure that you have all the required files, reinstall Microsoft Office by following these steps:
- Press Windows Key + I to access Settings.
- Navigate to Apps > Installed Apps.
- Find Microsoft Office, click the three dots icon, and choose Uninstall.
Pro Tip: Download the Microsoft Office installer from Office.com after uninstalling.
Step 3: Troubleshoot with Office Add-ins
Add-ins can sometimes trigger the interface not registered issue. To diagnose, disable all add-ins:
- Open Microsoft Word.
- Go to File > Options and select Add-ins.
- In the Manage dropdown, choose COM Add-ins and click Go.
Pro Tip: Enable add-ins one at a time to identify any causing the error.
Step 4: Register Ole32.dll
Confirm that the Ole32.dll file exists in the %windir%System32 folder and is registered correctly:
- Press Windows Key + X and select Windows Terminal (Admin).
- For 32-bit Windows, execute:
- For 64-bit Windows, run the following:
- Click OK in the RegSvr32 dialog.
regsvr32.exe %windir%\System32\Ole32.dll
%systemroot%\SysWoW64\regsvr32.exe %windir%\SysWoW64\Ole32.dll
Additional Tips for Users
- Ensure your Windows is updated for better compatibility with Office applications.
- Perform regular maintenance on your system to avoid future issues.
- Keep track of changes made to your system before the error occurred.
Summary
In this guide, we’ve explored valuable steps to resolve the 0x80040155 Interface Not Registered error that affects Microsoft Office applications. Implementing these methods should help restore normal functionality to your applications.
Conclusion
Addressing the 0x80040155 error promptly can prevent further disruptions in your workflow. By following the outlined steps, you can ensure that your Microsoft Office applications run smoothly. Stay proactive and keep your software updated to avoid future errors.
Frequently Asked Questions
How do I fix Excel activation?
You can quickly resolve Excel activation issues by signing in with your Microsoft account. Ensure you have an Office 365 subscription or have purchased a standalone Excel subscription.
What does “interface not registered” mean?
The message “interface not registered” generally indicates a problem with the Common Object Model (COM) interface of your Office installation. This can happen if version references for COM components are incorrect. Solutions may involve re-registering DLL files or reinstalling the affected Office component.