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 manage extensions in Microsoft Edge, including adding, disabling, or removing them as needed.

Contact Microsoft Support. What's new. Surface Pro; Surface Laptop; Surface Laptop Studio 2

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 troubleshoot Windows activation errors. Browse common activation errors and learn what you can do to fix them.

Discover the latest features in Office 2021, including new ways to create content, manage data, and communicate effectively.

In Windows 11, apps don't automatically get added to your desktop. Learn how to pin apps to your desktop or taskbar in Windows 11 or Windows 10.

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.

Microsoft's products and services work best if you use the same language and region across all your devices, and in all of your app and Store settings.

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