How to fix Office 2016 update error 30088-26

Office 2016 fails to install an update when you see error code 30088-26. In this article, we’ve listed the solution to fix the error while updating Office apps. Office 2016 update error 30088-26 occurs either you’re updating Office from Word 2016, Excel 2016, or Outlook 2016 app. An Office update error occurs on your computer due to an Internet connection, Windows Firewall, or Internet proxy problem. Follow the steps to resolve the Office update error.

Office 2016 update error 30088-26

Causes of Office 2016 update error 30088-26

  • Problems with internet connection.
  • Corrupt system files.
  • Third-party apps interrupt Office updates.
  • Windows Firewall and Internet Proxy setting block Office installer.

Steps to fix Office 2016 update error 30088-26

Office 2016 update error occurs due to internet connection error or could occur due to different reasons listed above. Follow the below steps to fix Office 2016 error 30088-26.

Step-1: Repairing Office apps

Repairing Office apps might fix an error that occurred due to corrupt system files. The Office repair tool repaired all corrupt and damaged Office files that were required to update Office successfully. Follow the steps to repair Office apps.

  1. Open Control Panel.
  2. Click Programs.
  3. Select Uninstall a program.
  4. Choose Microsoft Office that you want to repair.
  5. Click Change.
  6. Select Quick Repair and click Repair.
  7. Once repairing is finished. Try to update Office and check if the error persists again.

Note: If repairing didn’t fix the problems with updating Office 2016, then go to the next step to fix error code 30088-26.

Step-2: Uninstall and reinstall Office 2016

When repairing didn’t fix the Office update error, then you may see the error again when updating Office 2016. Here, you should try to uninstall Office and reinstall again to fix the problems. Follow the steps to uninstall the Office app.

  1. Open Control Panel.
  2. Click Programs.
  3. Select Uninstall a program.
  4. Choose Microsoft Office that you want to Uninstall.
  5. Click Uninstall.
  6. Select Uninstall again.
  7. Wait until uninstall is finished. Reboot your computer and reinstall Office 2016.

Step-3: Disable Windows Defender Firewall

Windows Defender Firewall is a security app that already comes with Windows 10 PC. Firewall eliminate unknown app access on your PC and provide security on your Windows 10 PC from all threat.

But, sometimes, the Firewall rule can block Microsoft Office to install or update on your PC. To make a temporary exception to your Windows Firewall rule, you should temporarily disable the Firewall during installing the Office app. Windows Firewall Block Office to install on your PC due to Internet connection problems.

Disable Windows Defender Firewall to remove error code

Do not forget to enable Windows Firewall after installing Microsoft Office.

Step to temporarily disable Windows Defender Firewall-

  1. Open Control Panel.
  2. Click Windows Defender Firewall.
  3. Click “Windows Defender Firewall on or Off”.
  4. Select Windows Defender Firewall Off for both types of networks and click OK.

Follow the Next method.

Step-4: Disable antivirus service

When you install an antivirus app to protect your PC from viruses and trojans. Windows Defender Firewall disabled by the antivirus app and antivirus manage your PC Firewall service with their own features. To make a temporary exception to your Windows Firewall rule, you should temporarily disable the antivirus during installing the Office app.

Follow the step to temporarily disable an antivirus app-

  1. Open Antivirus app.
  2. Select Settings.
  3. Disable Firewall and other protection.
  4. Disable real-time protection.

Please do not forget to enable the antivirus app after Office install on your PC.

Follow the next method.

step-5: Run SFC Scan

SFC scan command initiates to remove corrupt system files on your Windows 10 PC by using Command Prompt. Before installing Microsoft Office, you should check corrupt system files on your PC and remove them first.

RUN SFC Scan command to eliminate Office error code

Step to run the SFC scan command on your PC-

  1. Open Command Prompt. (As an administrator)
  2. Type SFC /SCANNOW and press Enter.

If Windows found security violations and corrupt system files, follow the step to remove corrupt files shown on your Command Prompt screen.

Follow the next method.

Step-6: Download and install Office 2016 after resolving update error 30088-26

  1. Open your web browser app.
  2. Type https://account.microsoft.com and press Enter.
  3. Click Services & subscriptions.
  4. Select Office 2016 product and click download.
  5. Open download folder where Office setup file is download.
  6. Select Office setup.exe file and click Run.
  7. Follow the rest when promoted on the Office installer screen.
  8. Click close when installing is finished.

We value your feedback. Please let us know if you found any of these solutions helpful. If it didn’t, tell us more about your issue, including any error messages you’re received and where you were in the install process when you received it. We’ll use that information to help investigate your issue further.