Microsoft 365 Error Codes

Fix Microsoft 365 TPM Error C0090016 After Motherboard Replacement

Olivia Miller Oct 8, 2026 871 views

Question details

The user needs to resolve a TPM authentication error that blocks Microsoft 365 sign-in after a hardware change.

How to Fix Microsoft 365 TPM Error C0090016 After a Motherboard Replacement

Product: Microsoft 365
Device & OS: Windows (Lenovo laptop)
Scenario: Attempting to sign in to Microsoft 365 desktop applications after the device's motherboard was replaced.
Observed behavior: Microsoft 365 apps display TPM error C0090016. Standard troubleshooting methods like reinstalling Office, clearing the TPM, and running the Support and Recovery Assistant fail to resolve the sign-in block.

Before you start

Ensure you have your Microsoft 365 account credentials ready and save any open files, as the troubleshooting steps will require you to restart your computer.

Solution 1Recommended

Disconnect and Reconnect Your Work or School Account

Resetting the Windows account connection clears obsolete hardware tokens and forces the system to generate a valid TPM token for the new motherboard.

Because the TPM chip is physically attached to the motherboard, replacing the motherboard invalidates the cryptographic keys previously used to authenticate your Microsoft 365 session. Windows must be forced to establish a brand-new connection.

Close all Office applications

Ensure that Word, Excel, PowerPoint, and any other Microsoft 365 desktop applications are completely closed before proceeding.

Navigate to Windows Settings

Click the Start menu and open Windows Settings, then navigate to 'Accounts' and select 'Access work or school' from the side menu.

Disconnect the problematic account

Locate and click on your connected Microsoft 365 account in the list, then click the 'Disconnect' button and confirm the action.

Restart and reconnect

Restart your computer. Once logged back into Windows, return to the 'Access work or school' settings page, click 'Connect', and sign in with your Microsoft 365 credentials.

Disconnect and Reconnect Your Work or School Account

Account Not Listed?: If no account is listed in the 'Access work or school' menu, you can simply click 'Connect' to add your work or school account, restart your PC, and then attempt to sign in to Office.

Solution 2

Contact Your Microsoft 365 Administrator

If local account resets fail, your organization's IT administrator may need to intervene to clear the hardware association on the backend.

Free Microsoft Office alternative

Use WPS Office to Access Your Documents Without TPM Errors

Dealing with persistent Microsoft 365 sign-in and TPM hardware errors can severely disrupt your workflow. Switch to WPS Office, a powerful and lightweight alternative that lets you edit your essential documents locally without relying on complex device authentication.

1. Download WPS Office: Visit the official WPS website and download the free installation package for your Windows PC.
2. Install the Software: Run the installer and follow the quick on-screen instructions to set up the software.
3. Open Your Files Instantly: Double-click any existing Office document to open and edit it instantly, completely bypassing Microsoft 365 sign-in blocks.

Fully compatible with Microsoft Word, Excel, and PowerPoint file formatsNo complex TPM or Azure AD sign-in dependencies required for local editingLightweight installation that works smoothly on newly repaired devicesCompletely free to download and use with a highly familiar user interface

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Frequently Asked Questions

Why does a motherboard replacement trigger TPM error C0090016?

The Trusted Platform Module (TPM) chip stores the cryptographic keys used for Microsoft 365 authentication. When a motherboard is replaced, the physical TPM chip changes, which invalidates the old security tokens and causes a sign-in failure.

Will clearing the TPM via Windows Security resolve error C0090016?

In most cases, simply clearing the TPM is not enough. You must also sever the link between Windows and the Microsoft 365 server by disconnecting and reconnecting the Work or School account in Windows Settings.

Can I access my Microsoft 365 files while the desktop apps are broken?

Yes. TPM error C0090016 generally only affects local desktop applications. You can temporarily bypass this issue by signing into Microsoft 365 via a web browser to access Office Online.

Microsoft Office Error Codes