了解如何使用产品密钥或数字许可证激活 Windows、检查激活状态，以及链接Microsoft 帐户。

Learn how to reinstall Windows on your PC and how activation works after it's installed.

Install Office 2007. Insert your Office 2007 CD into the drive. If the setup wizard doesn’t start automatically, navigate to the CD drive and click SETUP.EXE.

Windows 10 and 11 contain a large set of emojis. To insert one: Put your cursor where you want the emoji.

Learn about what effect closing a Microsoft account might have on your other apps and services.

Summary. Microsoft Update Health Tools is offered to devices through Windows Update as update KB4023057. This update is applicable for both Windows consumer and commercial devices, with a slightly different purpose and functionality.

Learn how to use antivirus protection in Windows Security to protect your Windows PC against malware, viruses, and other threats.

Use OneDrive as a cloud backup to share your files and folders with others. Learn how to control permissions, allow editing, or set expiration dates.

Get help and support for Microsoft Edge. Find Microsoft Edge support content, how-to articles, tutorials, and more.

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