Learn how to update your security processor or TPM firmware to protect Windows 10 and your device from attacks by malicious software.

Find your product key to activate Windows. A product key is a 25-character code that's used to activate Windows and helps verify that Windows hasn't been used on more PCs than the Microsoft Software License Terms allow.

Use data validation rules to control the type of data or the values that users enter into a cell. One example of validation is a drop-down list (also called a drop-down box or drop-down menu). Watch more in this video.

Learn how to uninstall a Windows update, if for example that update is causing your system to have errors or other problems.

Change or delete a header or footer from another single page. To delete or change headers and footers on individual pages within a document, start by inserting a section break.

Windows で BitLocker 回復キーを見つけるためのさまざまな方法について説明し、BitLocker がシステムでどのようにアクティブ化されているかについて説明します。

Learn how to get ready for the Windows 11 upgrade, from making sure your device can run Windows 11 to backing up your files and installing Windows 11.

Aprende a actualizar controladores en Windows usando Administrador de dispositivos para actualizar o reinstalar un controlador.

Your PC can run Windows 11 if it meets the minimum system requirements specified by Microsoft.

How to add and request read receipts and delivery notifications in Outlook.