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.

Get help if you're having problems sending someone a digital Xbox game or subscription as a gift.

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

Find out how to resolve your Xbox purchase error when you're trying to buy something from the Microsoft Store.

Windows themes are a combination of desktop background pictures, window colors, sounds, and other elements that allow you to personalize your Windows experience. Themes provide a cohesive and visually appealing interface that can enhance productivity and enjoyment while using your device. Apply a theme In the Settings app on your Windows device, select Personalization > Themes or use the ...

Find out how to request a replacement for your Xbox controller.

摘要 Email 簽名能在你的商業溝通中建立專業一致性，並確保收件人在每則訊息中都擁有你的聯絡資訊。 在Outlook中，你可以為不同用途設定多個簽名 (內部與外部、個人與商務) ，並選擇是否自動包含在新郵件、回覆或轉寄中。

了解如何管理 Xbox 訂閱及解決帳單問題，獲取詳細資訊以輕鬆處理相關事務。

在行動裝置上，您可以嘗試在 Word 的檔中新增簽名欄的一些因應措施。 您可以使用底線鍵或單一儲存格表格，在 Word 檔中新增簽名列。 您也可以插入實際簽章的圖形。 不過，您必須安裝載入巨集，才能從行動裝置將 數位 簽名欄新增至 Word 或 Excel 檔案。

在 Xbox 上購物時，收到錯誤訊息或錯誤碼嗎？ 了解它們代表的意義。