安裝 Microsoft Defender，保護您的Android、iPhone、Mac和 Windows 裝置免於受到威脅。 在您的裝置上下載 Microsoft Defender，方法如下： 掃描下列 QR 代碼 在 App Store 中搜尋 Microsoft Defender 與您的裝置共用，下列連結： 複製連結 我們鼓勵您為每個人至少在五部裝置上安裝 Microsoft Defender。 準備好試試看了嗎？

Get accessibility help Accessible help and resources to get your Xbox questions answered.

You'll first want to find out if your Windows 11 is activated and linked to your Microsoft account. It is essential that you link your Microsoft account to the Windows 11 license on your device.

To find out if your PC supports this, select Settings > System > Display. Under Brightness and color, look for the Change brightness automatically when lighting changes check box, and then select it to use this feature. This automatic setting helps make sure your screen is readable wherever you go.

Before you can use Authenticator as a way to sign in, you need to download the app and have already added Authenticator to your accounts. Starting July 2025, the autofill feature in Authenticator will stop working, and from August 2025, passwords will no longer be accessible in Authenticator.

When you see the message, You're all set, you can access your Microsoft 365 applications. After your Microsoft 365 installation is complete, you need to activate Microsoft 365. Be sure you're connected to the Internet and then open any Office application, such as Word or Excel.

Learn how to download and install apps you need from your Microsoft 365 business subscription.

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This completes the download of Microsoft 365 to your device. To complete the installation and activation steps, follow the prompts in the following install and activation sections.

此工具會嘗試套用已知的修正程式或修復支援的 .NET Framework 版本損毀的安裝來解決這些問題。 工具具有簡單易用的精靈使用者介面 (UI) 。