Download and install or reinstall Office 2019, Office 2016, or Office ...
Learn how to download and install Microsoft 365 or Office 2019, 2016, or 2013 on your PC or Mac. Find out how to activate Office, troubleshoot issues, and switch languages or bit versions.
Applies To:
Office 2019, Office 2016, Office 2016 for Mac, Office 2013
Create installation media for Windows - Microsoft Support
Learn how to create a USB flash drive or DVD to install or reinstall Windows 11, 10, 8.1, or 7. You'll need a reliable internet connection, a blank storage device, and a product key (if applicable).
How to sign in to or out of Outlook.com - Microsoft Support
Learn how to access your Outlook.com, Hotmail, Live, or MSN email account and troubleshoot common sign-in issues. Find tips, links, and help options for Outlook.com users.
Applies To:
Outlook.com
Find your BitLocker recovery key - Microsoft Support
Learn how to locate your BitLocker recovery key, a 48-digit number needed to unlock an encrypted drive in Windows. See where to find it attached to your Microsoft account, work or school account, printout, or USB flash drive.
How to start a scan for viruses or malware in Microsoft Defender
Learn how to use Microsoft Defender to check your device for malware on Windows, Android, or Mac. Find out the signs of infection, the types of scans, and how to run Microsoft Defender Offline for a deeper scan.
Applies To:
Microsoft Defender on Android, Microsoft Defender on Mac, Microsoft Defender on Windows
Download and install or reinstall Microsoft 365 or Office 2021 on a PC ...
Learn how to download and install Microsoft 365 or Office 2021 on a PC or Mac with a Microsoft account, work or school account. Find out how to activate, change versions, and troubleshoot common issues.
Applies To:
Office 2024, Office 2024 for Mac, Office 2021, Office 2021 for Mac, Office 2019, Microsoft 365 for home, Office for business, Office 365 Small Business, Microsoft 365 admin, Office 365 operated by 21Vianet, Office 365 operated by 21Vianet - Admin, Microsoft 365 for Mac, Office 365 Germany - Enterprise, Office 365 Germany - Enterprise admin
Check the recent sign-in activity for your Microsoft account
Learn how to view and manage the sign-in history of your Microsoft account for the last 30 days. Find out how to change your password, update security settings, and contact support if you need help.
Applies To:
Microsoft account dashboard
下载并安装或重新安装 Office 2019、Office 2016 或 Office 2013
如果这是你第一次安装 Microsoft 365，则可能需要先执行一些设置步骤。展开下面的 “了解详细信息”部分。 但是如果是重新安装 Microsoft 365，且已兑换了产品密钥并拥有与 Microsoft 365 相关联的帐户，请转到“登录并安装 Office”的部分。
Applies To:
Office 2019, Office 2016, Office 2016 for Mac, Office 2013
POP, IMAP, and SMTP settings for Outlook.com - Microsoft Support
Learn how to find and use the POP, IMAP, and SMTP settings for your Outlook.com account. You can also enable POP or IMAP access, troubleshoot connection errors, and get help from the Outlook.com community.
Applies To:
Outlook for Microsoft 365, Outlook for Microsoft 365 for Mac, Outlook 2024, Outlook 2024 for Mac, Outlook 2021, Outlook 2021 for Mac, Outlook 2019, Outlook 2016, Outlook Web App for Office 365, Outlook Web App for Office 365 Small Business, Outlook on the web, Outlook.com, Outlook Web App for Office 365 operated by 21Vianet, Outlook Web App Light, New Outlook for Windows, Outlook for Android, Outlook Mail for Windows 10, Outlook on the web for Exchange Server 2016, Outlook on the web for Exchange Server 2019, Outlook Web App
在 Microsoft Edge 中更改默认搜索引擎 - Microsoft 支持
将必应作为默认搜索引擎，将增强在 新版 Microsoft Edge 中的搜索体验，包括直接指向 Windows 应用的链接、来自组织的相关建议（如果使用工作或学校帐户登录），和有关 Windows 的问题的即时解答。 但是，你可以将默认搜索引擎更改为使用 OpenSearch 技术的任何站点。