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

Learn different ways to locate your BitLocker recovery key in Windows, and learn about how BitLocker might have been activated on your system.

Protect your Android, iPhone, Mac, and Windows devices from threats by installing Microsoft Defender. Download Microsoft Defender on your devices either by:

Update Surface devices and Windows. Download the latest drivers and firmware updates to keep your Surface devices performing their best.

Windows 11, version 22H2; July 25, 2024—KB5040527 (OS Builds 22621.3958 and 22631.3958) Preview; July 9, 2024—KB5040442 (OS Builds 22621.3880 and 22631.3880)

Learn how to locate and manage your app permissions on Windows devices. Some apps or games need specific permissions to work properly.

Learn how to recover files that have been lost, deleted, or accidentally changed.

Learn how to troubleshoot when the camera is not working in Windows or you see errors 0xA00F4244 or 0x200F4244.

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。

Copilot in Word ushers in a new era of writing, leveraging the power of AI. Check out this article to learn more.