Find Microsoft Excel help and learning resources. Explore how-to articles, guides, training videos, and tips to efficiently use Excel.

Bộ phận hỗ trợ của Microsoft sẵn sàng trợ giúp bạn về các sản phẩm của Microsoft. Tìm bài viết hướng dẫn, video và nội dung đào tạo về Microsoft Copilot, Microsoft 365, Windows, Surface, v.v.

Starting July 14, 2023: Existing Primary and Secondary members will be emailed details describing this change.; Starting July 17, 2023: Primary account holders will no longer be able to add new members to their shared membership.; August 15, 2023: Existing memberships will end and Xbox Game Pass Friends & Family will no longer be available.; Starting August 15, 2023: We’ll be sending Xbox ...

You may see an "account frozen" message and icon if you have exceeded your storage allowance and/or haven't signed in for a long time. You just need to get back under your Microsoft storage quota to get access to your files again.

Learn how to manage the online safety and privacy settings on the Xbox console for you and every member of your family group.

Published August 2021. This article is intended for users who are not able to upgrade to Windows 11 because their PC is not currently Secure Boot capable.

Controller serial numbers are 14 characters long and don’t include dashes. Your controller serial number may not be recognized if you’ve never connected your controller, or if you connected for the first time within the last 48 hours.; If you have the Xbox Elite Wireless Controller Series 2, the 14-character serial number is in the lower center on the back of the controller.

Learn more about updates for Windows 10 version 1903, including improvement and fixes, any known issues, and how to get the update.

需要有关 Xbox 主机、Xbox 游戏或 Xbox 网络的帮助?了解如何与我们联系。

Why some files won't open in Internet Explorer. Internet Explorer uses add-ons such as Adobe Reader to view some files in the browser. If a file that needs an add-on won't open, you might have an older version of the add-on, which needs to be updated.