Windows iOS Android View protected files in Windows using the Microsoft Purview Information Protection viewer If you are trying to open a protected file in Windows and it does not open properly, then you will likely need to use the Microsoft Purview Information Protection viewer for the desktop. The information protection viewer supports the following file types and environments.

Microsoft 使用年齡保證來協助提供適合年齡的體驗，並符合當地法律要求。 年齡保證會使用隱私權保護方法確認您的帳戶符合最低年齡要求。 需求因國家和地區而異。 如果年齡保證適用，系統可能會要求您驗證年齡才能繼續使用 XBOX 上的某些功能和內容。 本頁涵蓋這對 XBOX 玩家的意義。 如需完整的 ...

These instructions may help with troubleshooting activation by removing all Office license files from your Mac. For example, if you previously installed a one-time purchase of Office for Mac and have switched to Microsoft 365, you may not be seeing subscription features because your copy of Office is still using your old license.

Find out how age assurance works on XBOX, what happens if your age is not verified, and where to verify your age for your Microsoft account.

Certificate authority (CA) A certificate authority is an entity similar to a notary public. It issues digital certificates, signs certificates to verify their validity and tracks which certificates have been revoked or have expired. Top of Page Digital signature assurances The following terms and definitions show what assurances are provided by digital signatures. Authenticity The signer is ...

注意 Microsoft Authenticator 不 适用于电脑或 Mac，因为出于安全原因，验证器应用是专为智能手机设计的。 了解详细信息。 Microsoft 不再支持超过一年的 Authenticator 版本。 始终使设备保持最新。 中国用户应阅读 如何在中国下载和使用 Microsoft Authenticator。

Learn how to use an eSIM to connect your Windows PC to the internet over a cellular data connection.

Windows 產品金鑰是用來啟用 Windows 的 25 個字元代碼。 看起來像這樣： 產品金鑰：XXXXX-XXXXX-XXXXX-XXXXX-XXXXX 找到你的 Windows 10 或 Windows 11 產品金鑰 根據你取得 Windows 10 或 Windows 11 的方式，你需要 25 字元的產品金鑰或數位授權來啟用。 數位授權是一種在 Windows 10 和 Windows 11 中啟用的方法，不需要輸入 ...

Use Windows Search in the taskbar or File Explorer to quickly locate files, apps, and settings. Integrated search helps return relevant results quickly, reducing time spent navigating folders.

Learn how to find a Windows product key for activation, and when you'll use a digital license instead.