How to calculate the number of days, months, or years between two dates using the DATEIF function in Excel.

You can upgrade from Windows 10 to Windows 11 if your device meets hardware specifications, and if the Windows 11 release has been made available to your device.

了解可以在 Windows 中尝试的不同操作，以解决以太网网络连接问题。

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。

See what's new in recent Windows 10 and Windows 11 updates, including a chat from the taskbar, widgets, snap groups, and more.

Export Outlook email, contacts, and calendar to move them to another computer or so that you can make a backup of your information.

Get free Windows themes from Microsoft to personalize background, colors and sounds for your PC.

There are different ways to remove apps and programs, so if you can't find the one you're looking for, you can try another location. Note that some apps and programs are built into Windows and can't be uninstalled.

This update for the Microsoft Visual C++ 2013 Update 5 Redistributable Package is released as a download-only update and isn’t distributed through Windows Update. Redistribution of this update is allowed, subject to the same license terms as granted by the Microsoft Visual Studio 2013 Update 5 release.

Change your password with your email provider. See the following sections for instructions on changing your email account password for several major email providers.