Learn how to free up space for Windows update including deleting nonessential files, using an external hard drive, and updating your hard drive.

Microsoft .NET Framework 4.8.1 is a highly compatible and in-place update to .NET Framework 4.8. It includes native support for the Arm64 architecture (Windows 11+), accessibility improvements as well as other improvements.

Windows Hello. Windows Hello 可使你通过你的面部、虹膜、指纹或 PIN 登录到你的设备、应用、在线服务和网络。 即使你的 Windows 设备可以使用 Windows Hello 生物识别，也不必这么做。

Learn how to use OneDrive Files On-Demand to sync your OneDrive files and save disk space in Windows 10.

Learn how to manage background activity for apps to help save battery power in Windows.

Learn how to use a health report in Windows Security to manage your device performance and keep your device secure.

After launching an Office app, you might receive a message that says Get genuine Office.. If you see this, we've determined that the Office product installed on your device isn't legitimate and you may be a victim of software counterfeiting.

Learn how to download files from the web, change your default download location, and find files you've downloaded on your PC using Internet Explorer.

学习如何在 Windows 中解决 USB-C 问题，修复 USB 设备、端口和适配器无法正常工作。

如何激活预安装在新 Windows 10 计算机上的 Office 或使用新的产品密钥。