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

Find help and how-to articles for Windows operating systems. Get support for Windows and learn about installation, updates, privacy, security and more.

Summary. This security update makes improvements to Secure Boot DBX for the supported Windows versions listed in the "Applies to" section. Key changes include the following:

Find out how to use Game Bar to record your epic gaming moments.

Learn how to use Xbox cloud gaming on various devices including Android, iOS, and Windows with this comprehensive guide.

若要下载 Internet Explorer 11 的脱机安装程序，请选择下面的语言和系统。

Find out how to manage your Xbox subscriptions to request a refund or cancel a recurring payment.

Learn about co-authoring and editing PowerPoint presentations at the same time as other people and how to resolve conflicting changes in PowerPoint.

Learn how to open MSConfig in Windows 10 using the taskbar search bar and access system configuration.

Use Find my device to locate and lock your lost or stolen Windows devices.