Learn how to use Manage and Optimize Drives to keep your disk and data drives defragmented and at top performance in Windows.

Contact Microsoft Support. Find solutions to common problems, or get help from a support agent.

The Microsoft Authenticator app helps you sign into your accounts when you're using two-step verification.

Learn how to view or edit passwords saved in Microsoft Edge using the Microsoft password manager.

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注意 Microsoft Authenticator 不适用于 电脑或 Mac，因为验证器应用是出于安全原因为智能手机设计的。 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状态。 中国用户应 了解如何在中国下载和使用 Microsoft Authenticator。

To download Office apps to your Android tablet or Android phone: Go to Google Play on your device. Search for the Office app you want, and then tap Install.

注意 Microsoft Authenticator 無法 支援 PC 或 Mac，因為認證器應用程式是為智慧型手機設計，出於安全考量。 深入了解。 Microsoft 不再支援超過一年的 Authenticator 版本。 請隨時保持裝置更新。 中國用戶應閱讀 如何在中國下載及使用 Microsoft Authenticator。

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