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

Learn how to find which version of Windows operating system your PC is running and device specifications.

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Learn how to use the On-Screen Keyboard (OSK) instead of a physical keyboard to type and enter text on your PC.

How to create or edit your Outlook signature for email messages. Include your signature, text, images, electronic business card, and logo.

Learn how to troubleshoot problems updating Windows. Find answers to common questions and issues installing Windows updates.

可通过不同的方式删除应用和程序，因此如果找不到要查找的应用和程序，可以尝试另一个位置。 请注意，某些应用和程序内置于 Windows 中，无法卸载。

Learn how to open and run DxDiag.exe on Windows to collect device information and troubleshoot DirectX sound and video issues.

Learn how to personalize a Windows lock screen with a background photo, slideshow, or app notifications.

Learn how to reinstall Windows on your PC and how activation works after it's installed.