1. Sign in with your Microsoft account. You will be prompted to Sign in with Microsoft account. If you have an existing Microsoft account on your mobile device then you will be asked to confirm your account, then click Continue.. If you don't have an existing Microsoft account on your mobile device then you will be asked to sign into your account or create a new one, then click Continue.

Windows 11 N: Select the Start button, then select Settings > Apps > Optional features.. Select View features next to Add an optional feature, and then select the Media Feature Pack in the list of available optional features.

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查找有关 Windows 操作系统的帮助和操作方法文章。 获取对 Windows 的支持，并了解安装、更新、隐私、安全等方面的信息。

ReadyBoost 可让你使用可移动驱动器（如 U 盘）来提高电脑性能，而无需拆开电脑增加内存 (RAM)。 若要使用 ReadyBoost，你需要至少具有 500 MB 可用空间和高数据传输速率的 U 盘或内存卡。

Click an add-in to read more about it, including a longer description and customer reviews, if available. Then, click Add, Try, or Buy for the add-in you want.. If you’re prompted to sign in, type the email address and password you use to sign-in to Office programs.

To check activation status in Windows 11, select the Start button, and then select Settings > System and then select Activation .. Your activation status will be listed next to Activation.. Check activation status in Settings. You'll see one of these activation status messages on the Activation page:

Microsoft support is here to help you with Microsoft products. Find how-to articles, videos, and training for Microsoft Copilot, Microsoft 365, Windows, Surface, and more.

We improved Excel’s memory allocation with Large Address Aware Excel, increased copy/paste speed, undo, conditional formatting, cell editing and selection, scrolling, filtering, file open, and programmability.

Windows 10, version 2004 and Windows Server, version 2004 update history; End of service statement; December 14, 2021—KB5008212 (OS Builds 19041.1415, 19042.1415, 19043.1415, and 19044.1415)