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

Learn how to find and change settings in Windows. Find your Windows settings in a snap! Select the Start button, then select Settings .From there, browse the categories or use search to find what you're looking for.

Learn how to update Windows to ensure your device operates smoothly and securely with the latest features.

In Outlook, you have the option to: Add a new Yahoo account | Set Yahoo account as primary | Delete existing Yahoo account. Add a new Yahoo email account. On the View tab, select View settings.

Learn why it's important to have a backup, and how Windows Backup can help you keep your files and settings safe.

Learn how to remove malware from your PC. Use Microsoft Defender Antivirus in Windows 10 or Windows 11 to scan your PC for malware, viruses, or other threats.

Learn how to redeem a gift card, code, or Office product key and spend your balance at Microsoft Store online, on Windows, or Xbox.

如何将 IF 函数 (与 Excel 中) AND、OR 和 NOT 函数结合使用，以在给定值之间进行逻辑比较。

忘れた場合や紛失した場合に Windows パスワードを変更またはリセットする方法について説明します。

Microsoft Defender is a new security app that helps protect you and your family across all your devices; Windows, Android, Mac, and iOS.