Learn how to rip (copy) and burn (create) CDs and data DVDs using Windows Media Player.

Get more out of your email with Outlook.com. We've streamlined search to make it easier than ever to find what you're looking for. New features like Files and attachment previews let you see your pictures and files without leaving your inbox.

If your Outlook.com account has been blocked, follow the instructions in this article to unblock it.

You can reduce the file size and save disk space by compressing pictures in your document. The compression options reduce both the file size and picture dimensions based on how you intend to use the picture, such as viewing on screen or in an email message.

获取 Windows 操作系统的官方支持和帮助信息，以及如何使用 Windows 的指南。

Learn how to update your security processor or TPM firmware to protect Windows 10 and your device from attacks by malicious software.

Newer Surface devices come with Windows 11 already installed. Other Surface devices can be upgraded from Windows 10 to Windows 11.

Learn how to find the serial number on your Surface so you can register your product or request service.

Note: If you receive a prompt asking whether to allow the app to access your camera (iOS) or to allow the app to take pictures and record video (Android). select Allow so the authenticator app can access your camera to take a picture of the QR code in the next step.If you don't allow the camera, you can still set up the authenticator app as described in Manually add an account to the app.

Download information. The following files are available for download from the .NET Download site: Download the Microsoft .NET Framework 4.8 offline installer package now.