How to Repair Error Code 30088-26 when Updating Microsoft Office on Windows 10

Microsoft Office is a comprehensive utility that you use in your daily life to make your work easier. In other words, Microsoft Office is a group of different small applications that includes MS Word, MS Excel, MS PowerPoint, MS Outlook, MS Publisher, MS Access, OneNote, Visio, OneDrive and Skype. First of all, you must have Microsoft Office installed on your Windows 10 PC in order to use these applications.

Error code 30088-26 is an error message that explains the cause of the problem that occurs when you try to install Microsoft Office. A pop-up window appears on your computer screen with an error message that tries to explain the cause. Sometimes error code 30088-26 can also appear when you try to update Office applications or uninstall Office from your computer.

In this techquack article, we have listed solutions to fix error code 30088-26. To remove the error message in Microsoft Office, you need to perform them first.

What is the cause of “error code 30088-26” in Microsoft Office?

Corrupt installation remnants: There are situations when a previous Office installation interferes with the installation of a pending update for the same Office program.

Outdated Windows 10: It turns out that this particular error can also occur due to the lack of an infrastructure update that Office needs.

Damaged Office installation: If this problem occurs when you try to install an update for a single Office application, you may be dealing with a corruption issue rooted in the registry files.

How to fix “error code 30088-26” in Microsoft Office?

Restore the Office installation

  1. Open the Run dialog box by using the Windows + R keys. Type appwiz.CPL and click OK to open Programs and Features.
  2. In the Programs and Features window, find the Microsoft Office Suite or Microsoft 365 installation.
  3. Right-click it and choose Edit from the context menu.
  4. If UAC asks for permission, click Yes to continue.
  5. Select Repair Online and click Repair. Make sure you are connected to the Internet during this process.
  6. In the Ready to Start Online Repair dialog box, select Repair.
  7. After the repair is complete, reboot the system to see if the problem is resolved.

Updating MS Office to the latest version

  1. Open MS Word and click Account.
  2. Click the Update Options menu and select Update Now from the drop-down list.
  3. Follow the instructions on the screen to perform the upgrade.
  4. MS Office will now download and install the available updates without errors.

Install any pending Windows updates

  1. Press the Windows + R keys to open the Run dialog box.
  2. Type ms-settings:windowsupdate to open Windows Update in the Settings application.
  3. Under Windows Update, click Check for updates.
  4. Install all Windows updates (including cumulative and security updates) that are scheduled to be installed.
  5. Reboot the system after each pending update and try updating MS Office to see if the same problem persists.

Reinstalling MS Office

  1. Open the application settings by pressing the Windows + I keys. Select Apps from the list of options.
  2. Under Apps and Features, locate the Microsoft 365 application in the list of applications.
  3. Click the Uninstall button.
  4. In the confirmation message that appears, click Uninstall.
  5. Log in to your Microsoft online account through your browser.
  6. Click Install Office in the upper right corner to download the installer.
  7. Double-click the downloaded file to start the automatic installation of Microsoft Office to fix the error.

Frequently Asked Questions

  1. Open Windows 10 preferences.
  2. Click on Applications.
  3. Click on Applications and features.
  4. Under Applications and features, select Microsoft Office 365.
  5. Click the Edit button.
  6. Select the online restore option to fix error 30088-26.
  7. Click the Repair button.

  1. Go to and sign in with an existing Microsoft account or create a new account.
  2. Follow the rest of the instructions to complete tying your Microsoft account to this version of Office.

  1. Click Start, then Control Panel.
  2. Double-click Programs and Features.
  3. Click Microsoft office 365, then click Edit.
  4. Select Quick Fix, then click Repair.
  5. You may need to restart your computer after the repair process is complete.

  1. Go to Control Panel -> Programs -> Uninstall Program.
  2. Find and select the version of Microsoft Office on your computer. Click Edit in the top pane.
  3. Select Quick Fix -> Restore.