Cannot open Excel, Word, or PowerPoint files from Microsoft OneDrive on a Chromebook

NAOT 0 Reputation points
2026-10-27T00:46:05.42+00:00

【Microsoft OneDrive(Chromebook)からExcel・Word・パワポファイルが開かない】

使用製品はASUS Chromebookです。ChromebookではWebブラウザを介してWord、Excel、パワポなどが利用できますが、今朝方、いつも普通に開いていたMicrosoft OneDrive(Chromebook)からのExcel・Word・パワポファイルが、真っ白な画面が表示されたままでうまく開けない状態です(Excel・Word・パワポそれぞれで複数のファイルを開いてみましたが同様です)。また、Chromeをアップデートして、Chromebookを再起動してみたのですが変わらず・・です。完全個人ユースのパソコンです。

①なぜ、急にこのようなことになったのでしょう?(想定される原因)因みに、前回利用時は少しExcelファイルに上書きをして保存したぐらいです。この数週間、騒がれている情報セキュリティ対応の話と関連しそうでしょうか??
②どのように対処すれば良いでしょうか?

ご教示のほど、宜しくお願いいたします。

Microsoft 365 and Office | Excel | For home | Other
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  1. Jeronimo Fuerte 48,525 Reputation points Independent Advisor
    2026-10-27T01:37:53.9333333+00:00

    Could you please confirm whether you're opening your files through the Microsoft OneDrive folder in the Chromebook's Files app, or directly through the OneDrive website in Chrome? Also, are you able to open a newly created blank Word or Excel document? This would help determine whether the problem is related to the Chromebook's OneDrive integration or affects Microsoft 365 web applications generally.

    As an additional troubleshooting step, please open Chrome in Incognito mode, visit https://onedrive.live.com/, sign in to your Microsoft account, and try opening one of the affected documents directly from the website. If the file opens successfully, this may indicate that cached browser data or an extension is interfering with Microsoft 365. You can then try temporarily disabling Chrome extensions or clearing the cached data and cookies associated with Microsoft websites.

    If the documents work directly on the OneDrive website but still fail when launched through the Chromebook's Files app, another option is to reconnect the OneDrive integration, using the option to remove access and then reconnect your account.

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