Office 2019 not working after installing 2025-12 security patch (KB5072033) (26200.7462)

Question

2025-12 セキュリティ パッチ (KB5072033) (26200.7462)後からOffice2019が機能しなくなりました。回復方法をご教示ください。

症状

Eecelなどを開くと、”申し訳ございません。エラーが発生したため～正常に機能できなくなりました～終了する必要があります。”と表示され、ウィンドウを消すとアプリもしばらくして落ちます。

オプション操作もたどり着けません。

ﾁｬｯﾄGPT分析による現状

・Office のライセンス管理に関わる Windows 側の機能が動いていない可能性があり（Office Software Protection Platform サービス（osppsvc）がシステム上に存在しないことを確認  ）

・Office 側ではなく、Windows のライセンス保護基盤が破損している可能性が高い状況です。 

・Office の再インストールだけでは直らない状況

Answer 1

If Office 2019 is not functioning properly after installing the security patch (KB5072033), there are several steps you can take to troubleshoot the issue:

1. Check the Office Software Protection Platform Service: Ensure that the Office Software Protection Platform (osppsvc) service is running. You can do this by searching for "services.msc" in the Start menu, then locating the service and checking its status.
2. Repair Office: You can try repairing your Office installation. Go to Control Panel > Programs > Programs and Features, select Microsoft Office, and then choose "Change" to start the repair process.
3. Update Office: Sometimes, updating Office to the latest version can resolve issues caused by patches. Open any Office application, go to File > Account > Update Options, and select "Update Now".
4. Reinstall Office: If the above steps do not work, you may need to uninstall and then reinstall Office. Make sure to back up any important files before doing this.
5. Check for Windows Updates: Ensure that your Windows operating system is fully updated, as there may be additional patches or updates that could resolve compatibility issues.

If these steps do not resolve the issue, you may need to consult Microsoft support for further assistance.

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References:

• "Microsoft Office cannot verify the license for this product" error when you start an Office app
• Some Office applications are not responding