MS Office 2019 is not working

Repair the Windows component files with DISM and SFC, then run an Online Repair of Office 2019; do not download or manually replace the reported DLL from a third-party website.

KB5132061 does not list an Office 2019 or sppc.dll publisher-warning issue among its known issues, so the timing alone does not establish that the update caused it.^1^

1. Repair Windows system components

The message refers to a DLL whose publisher or integrity Windows cannot confirm. Open Start, type Command Prompt, right-click it, and select Run as administrator.

Run these commands in order:

DISM.exe /Online /Cleanup-Image /RestoreHealth
sfc /scannow

Wait for DISM to complete before starting SFC, and do not close the window until SFC reaches 100%.^2^

Then:

1. Restart Windows.
2. Open Word, Excel, and PowerPoint.
3. Check whether the publisher warning has disappeared.

If SFC says it found files but could not repair some of them, do not manually copy sppc.dll or sppcdll from another computer or download site. Record the complete SFC result for further Windows repair.

2. Repair the entire Office 2019 installation

If the warning remains:

1. Right-click Start and select Installed apps.
2. Find Microsoft Office 2019.
3. Select the … menu, then Modify.
4. For a Click-to-Run installation, select Online Repair > Repair.
   For an MSI installation, select Repair > Continue.
5. Restart Windows after completion.

Online Repair is preferable here because Quick Repair only detects and replaces certain corrupted files; repairing Office from this location repairs the complete suite.^3^

3. Check whether Smart App Control generated the warning

Open Windows Security > App & browser control > Smart App Control settings and note whether it is On, Evaluation, or Off. Smart App Control checks application reputation and valid signatures and warns when a component is untrusted.^4^

Do not turn it off merely to suppress this warning. Once manually switched off, it cannot return to Evaluation mode without resetting or reinstalling Windows. If this is an organization-managed device, provide IT with:

• the exact DLL name and full path shown by the warning;
• the affected Office applications;
• the DISM and SFC results;
• whether Online Repair corrected the problem.

Also verify whether the message says sppc.dll rather than sppcdll; the exact filename and path are important for identifying the blocked component.

4. Update removal is a temporary diagnostic only

If DISM/SFC and Office Online Repair both fail, and the issue started immediately after KB5132061, uninstalling that update can test whether the behavior is update-dependent:

Settings > Windows Update > Update history > Uninstall updates > KB5132061 > Uninstall

Removing a security update reduces protection, and some updates cannot be uninstalled. Reinstall the latest Windows update afterward rather than leaving the computer unpatched.^5^

Support status

Office 2019 can run on Windows 11, but its support ended on October 14, 2025. It no longer receives Microsoft technical support, bug fixes, or security fixes, so a newer supported Office release is the long-term resolution if this compatibility problem persists.^6^

References

1. November 10, 2026—KB5132061 (OS Builds 26300.9974, 26200.9974 and 26100 ...
2. Use the System File Checker tool to repair missing or corrupted system files | Microsoft Support
3. Repair an Office application
4. App & browser control in the Windows Security App | Microsoft Support
5. [Windows 11](https://support.microsoft.com/windows/deployment/updates-lifecycle/how-to-uninstall-a-windows-update#summary)
6. End of support for Office 2016 and Office 2019 | Microsoft Support