Also, you may be interested in our guide on fixing Office installation error 30016-22 on your PC.

What causes Office Update Error 30088-26?

You can experience issues with Office updates for several reasons. Some of them are:

Corrupt installation – Missing or corrupt system files on the previous Office due to viruses, downloading, or installation process can affect the app’s functionality, causing update errors. Outdated Windows OS – Not installing the latest updates and patches for your Windows operating system can cause it to malfunction, and it can affect the Office app and other programs on it. Also, it can cause compatibility issues with new software and hardware. Other software conflicts –  Security software like third-party antivirus and Windows Firewall can affect the Microsoft Office update, causing an update failure.

Nonetheless, we will guide you through quick steps to fix the error.

How can I fix the Office Update Error 30088-26?

Apply the following before proceeding with advanced troubleshooting steps:

Turn off background apps running on the PC that can affect app updates. Check the network connection on your device. Restart your device in Safe Mode, and check if the installation error is solved.

Proceed with the following advanced troubleshooting if the error persists:

1. Repair Office suit

Repairing the Office app will fix issues with corrupt installation files in the Microsoft Office app. Check our guide about repairing Office app on Windows 11.

2. Turn off Windows Defender’s real-time protection

3. Update Windows

Updating the Windows operating system will help download the infrastructural requirements needed by the Office update. Read about ways to fix Windows updates not working as it is a reported error. SPONSORED

4. Perform an SFC scan

The SFC scan command will scan and repair corrupted or missing system files on your device that can cause Office update failure. Check our article about ways to fix SFC scannow not working on your Windows device. Another reliable method of repairing OS files is using a dedicated application like Fortect to help you detect damaged or missing files and automatically replace them with clean parts from its repository.

5. Reinstall Office

Reinstalling the office file will fix bugs and corrupt files in the previously installed file. In addition, you can check out our guide on fixing Microsoft Office not opening on Windows devices. Further, we also have a guide on how to install free Microsoft Office for students. So, check that out if you need it. Should you have further questions or suggestions on this guide, kindly drop them in the comments section.

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