Play MP4 files in Windows 10 by right-clicking the file and choosing what application to open it with.

This article describes a problem with CD or DVD drives not work, or is missing, or not recognized after installing or uninstalling programs.

Create a system restore point. Communities help you ask and answer questions, give feedback, and hear from experts with rich knowledge.

See a list of options available for starting Windows in diagnostic modes such as safe mode.

Aprende a crear medios de instalación para instalar o reinstalar Windows 7, Windows 8.1 o Windows 10.

Get answers to some common questions about 32-bit and 64-bit versions of Windows.

To use voice typing, you'll need to be connected to the internet, have a working microphone, and have your cursor in a text box. Once you turn on voice typing, it will start listening automatically.

移动或复制单元格和单元格内容 文章; 更改 Excel 中的列宽或行高 文章; 查找或替换工作表上的文本和数字 文章; 合并和撤消合并单元格

If you don't recognize a charge on your account, go to the Manage your payments page of your Microsoft account dashboard and select "Investigate". Learn more.

Learn how to troubleshoot problems installing or running games from the Xbox app for PC.