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.

了解為什麼無法從 Microsoft 帳戶移除付款方式。

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

登入您想要更新的 Microsoft 帳戶。 Microsoft 帳戶 移至 [付款與帳單]，然後選取 [付款選項]。您可以從這裡新增或編輯付款方式。 在 付款方式 底下，您可以 新增付款方式、檢視或編輯卡片、或 移除卡片。 輸入更新的資訊，並選取 [儲存]。

Note This article only applies to when you're signed in with your Microsoft account. For example, a personal outlook.com email address. For information about managing your Microsoft 365 Copilot activity history when you're signed in with your work or school account, see Delete your Microsoft 365 Copilot activity history.

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