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Download and install or reinstall Microsoft 365 or Office 2021 on a PC ...
Change from a 32-bit version to a 64-bit version or vice versa. Activate Windows. Fix Bluetooth problems in Windows. Learn how to install, reinstall, or activate Microsoft 365 or Office 2019 on a PC or Mac.
Applies To: Office 2021, Office 2021 for Mac, Office 2019, Office 2019 for Mac, 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
Change the email address or phone number for your Microsoft account
Add, remove or update an email address or phone number. If you want to make changes to the email addresses or phone numbers associated with your Microsoft account, use our guided support tool below to help you update the right information in the right way.
Applies To: Microsoft account dashboard
Microsoft account security info & verification codes
Contact Support. For technical support, go to Contact Microsoft Support, enter your problem and select Get Help. If you still need help, select Contact Support to be routed to the best support option. Learn how to manage your Microsoft account security info and troubleshoot verification code issues.
Applies To: Microsoft account dashboard
Phone Link requirements and setup - Microsoft Support
If you see a list of Android devices, choose the one you wish to pair with Phone Link to access your favorite apps, respond to texts, make calls, view photos, and more from your PC. Grant permissions on the Link to Windows app on your Android device. You are all set to use Phone Link.
Xbox Status | Xbox Support
Did this resolve your issue? Check the Xbox services, games, and apps for any service outages.
Manage devices used with your Microsoft account
Select the device you want to find, then select Find. For more info on finding your device, go to Find and lock a lost Windows device. Learn how to manage your Microsoft devices. Add, remove, register, or rename a device on your Microsoft account.
Applies To: Microsoft account dashboard
Change the email address or phone number for your Microsoft account
You can create either a new Outlook.com email address or add an address that you already have. Then, select Add alias. After you’re returned to the previous screen, select Verify, and then follow the instructions that are provided. Or, select Add phone number.
Fix USB-C problems in Windows - Microsoft Support
With a USB-C connection, you can charge your Windows 11 PC, and you can also connect to other USB Type-C devices such as mobile phones, docking stations, display adapters, and other devices that have a USB-C port. Unfortunately, some combinations of hardware and software may cause problems. If this happens, you may get a notification that there ...
Microsoft Support
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.
下载并安装或重新安装 Office 2019、Office 2016 或 Office 2013
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 ...
Applies To: Office 2019, Office 2016, Office 2016 for Mac, Office 2013