Summary A BitLocker recovery key is needed when BitLocker can’t automatically unlock an encrypted drive in Windows. This is a 48‑digit number that lets you regain access to your drive.

Microsoft 支持可帮助你处理 Microsoft 产品的问题。 查找有关 Microsoft Copilot、Microsoft 365、Windows 11、Surface 等的操作方法文章、视频和培训。

Find answers to your questions about storing your game saves in the cloud, which allows you to play the same games on multiple consoles.

You can keep track of pre-ordered games—and anything else you've purchased through the Microsoft Store—by signing in to your Microsoft account. From there, select the Payment & billing tab, and then select Order history. This page allows you to easily view and manage your pre-orders in one place.

Learn how to activate Windows using a product key or digital license, check your activation status, and link your Microsoft account.

摘要 Email 簽名可為您的商務通訊建立專業一致性，並確保收件者在每封郵件中都有您的聯絡資訊。 在 Outlook 中，您可以針對不同目的設定多個簽名 (內部與外部、個人與公司) ，並選擇是否要自動將其包含在新電子郵件、回覆或轉寄中。 您的簽名可以包含文字、連結、圖片和影像 (例如手寫簽名或 ...

重要 Microsoft 支持部门无法检索、提供或重新创建丢失的 BitLocker 恢复密钥。

Windows 11 Windows 10 Before starting, make sure that the Windows 11 device supports Bluetooth. For more info on how to check, see Fix Bluetooth problems in Windows. For help with adding non-Bluetooth devices, see Add a hardware device to a Windows device.

Note The Surface Slim Pen and Slim Pen 2 don't have replaceable batteries. If you need help charging either, see Fix problems with charging your Surface Slim Pen.

學習如何找到 Windows 產品金鑰來啟用，以及何時會改用數位授權。