联系 Microsoft 支持人员。查找常见问题的解决方案，或从支持专员那里获取帮助。

Summary This out-of-band update for Windows Server 2022 (KB5091575) is cumulative. It includes fixes and improvements that are part of the following update: April 14, 2026—KB5082142 (OS Build 20348.5020) The following is a summary of the issues that this out-of-band update addresses when you install this update. The bold text within the brackets indicates the item or area of the change we ...

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.

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

Learn how to use keyboard shortcuts in Word to add accent marks, special characters, symbols, and more.

Get support, help, and learning resources for Microsoft 365. Organize your life, expand your creativity, and protect what’s important with Microsoft 365.

找出 Windows 7 或 Windows 8.1 的產品金鑰 解除安裝或重新安裝 Windows 7 或 Windows 8.1 時，通常需要產品金鑰。 一般來說，如果您購買的是 Windows 的實體版本，產品金鑰應該會在 Windows 包裝盒內的標籤上或卡片上。 如果 Windows 已預先安裝在電腦上，產品金鑰應該會顯示在裝置上的貼紙上。 如果您遺失或找 ...

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How to add a signature to your Word documents. You can also use the Signature Line command in Word to insert a line to show where to sign a document.

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