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

了解如何更改 Windows 中显示器的刷新率，以确定在屏幕上显示运动的平滑程度。

About Windows 11 in S mode. Windows 11 in S mode is a version of Windows 11 that's streamlined for security and performance, while providing a familiar Windows experience.

Go to Settings > Apps > Apps & features to change whether you're shown app recommendations when trying to install apps from outside the Store.

Learn how to troubleshoot Windows Media Player errors. Explore resources for general help with Windows Media Player.

Windows Security is pre-installed on Windows 10 and ready for you to use at any time.

Learn how to troubleshoot USB-C problems in Windows and fix USB devices, ports, and adapters not working properly.

We're committed to delivering continuous innovation by releasing new features and enhancements into Windows 11 more frequently. Windows devices get new functionality at different times as Microsoft delivers non-security updates, fixes, improvements, and enhancements via several servicing technologies—including controlled feature rollout (CFR). ...

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.

Learn how to get Microsoft account help, troubleshoot sign in issues, keep your account secure, and manage your Microsoft account dashboard.