Find answers to frequently asked questions about Office 2021 and Office LTSC for Windows and Mac on the official support page.

Learn how to navigate Windows using keyboard shortcuts. Explore a full list of taskbar, command prompt, and general Windows shortcuts.

Learn how to sign into your PC with Windows Hello using a PIN, facial recognition, or fingerprint.

Sign out of Hotmail or Outlook.com. To sign out, go to Outlook.com. Select your account initials or account picture at the top corner of your Inbox. Select Sign out. Tips: If you don't see your picture at the top of screen, check to see if ad blocking is turned on. Sometimes this prevents the picture from showing.

Learn how to change Windows display language and keyboard layout settings for websites and apps.

How to recall and/or replace an email message you sent by using Microsoft 365 and your built-in Exchange Server account.

Extensions, or add-ons, are simple tools that customize your browser experience and offer you more control. Here's how to add, turn off, and remove them in Microsoft Edge .

选择 “开始 > 设置 > 系统 > 显示 > 高级显示 ”。. 在 “选择刷新率 ”旁边，选择“ 动态 ”选项。. ( 注意 ：此选项仅在支持的硬件上可用。. 如果未看到 “动态” 选项，则硬件不支持 DRR.) 如果要禁用 DRR 并使用固定刷新率，可以从下拉菜单中选择特定值 ...

Learn how to download, install, and configure additional language packs for various versions of Windows.

In Windows 11 22H2, the default app used to host console windows has been changed to Windows Terminal. After the October 2022 update, Command Prompt, Windows PowerShell, and other console apps will appear inside an instance of Windows Terminal.