Office Installation Errors

How to Fix Office 2019 Error 30175-11 (31) During Reinstallation

Amos Gikunda Oct 12, 2026 869 views

Question details

The user is encountering error 30175-11 (31) when attempting to reinstall Microsoft Office 2019, caused by conflicting credentials from an old Microsoft account or corrupted leftover installation files.

How to Fix Office 2019 Error 30175-11 (31) During Reinstallation

Product: Microsoft Office 2019 Professional Plus
Device & OS: Windows
Scenario: Reinstalling Microsoft Office 2019 after a previous installation, licensing change, or account switch.
Observed behavior: The Office reinstallation fails with error code 30175-11 (31), and existing apps may display warnings requiring sign-in to an expired work or personal account.

Before you start

Before proceeding, ensure you have your original Office 2019 product key and the login details for the Microsoft account associated with your current license.

Solution 1Recommended

Remove Old Office Credentials and Clear Browser Data

Deleting outdated or conflicting Microsoft account credentials from your system prevents activation conflicts during the new installation.

Windows stores login credentials for Microsoft Office in the Credential Manager. If these credentials belong to an expired work account or a different personal account, they will block the new installation from verifying your license.

Sign Out and Close Apps

Close all running Office applications and ensure you are signed out of your current Microsoft accounts in any Office apps.

Open Credential Manager

Click the Windows Start button, type 'Credential Manager' into the search bar, and press Enter.

Locate Windows Credentials

Select the 'Windows Credentials' tab and scroll down to the 'Generic Credentials' section.

Delete Office Credentials

Find any entries that start with 'MicrosoftOffice'. Click on each entry to expand it, and select 'Remove' to delete it from the system.

Clear Browser Data

Open your default web browser, navigate to the settings, and clear your cache and cookies to ensure no old session data interferes with the new Office activation.

Credential Conflict Resolved: Clearing these credentials ensures that Office will prompt you for your new, valid license details upon your next installation attempt.

Solution 2

Perform a Clean Removal using the Office Scrub Tool

The official Microsoft uninstall tool removes leftover registry entries and corrupted files that a standard uninstallation might leave behind.

Solution 3

Reinstall Office 2019 with the Correct License

Once old files and credentials are cleared, reinstall Office using your vendor-provided setup file or your personal Microsoft account.

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Frequently Asked Questions

Why does the Office uninstall tool fail to run on my computer?

The Microsoft Support and Recovery Assistant (Office scrub tool) often fails if you attempt to run it in Windows Safe Mode. Ensure you restart your PC and boot Windows normally before running the cleanup tool.

Do I need to reinstall OneNote after fixing error 30175-11?

Yes, performing a deep clean using the Office scrub tool can sometimes remove the standalone OneNote application. If this happens, you can easily download it again for free from the Microsoft Store.

How do I stop Office from constantly asking for my old work account?

You must remove the cached account details from your operating system. Open the Windows Credential Manager, navigate to 'Windows Credentials', and delete any entries related to your old Microsoft Office work account under Generic Credentials.

Installation & Activation