Download and install or reinstall Microsoft 365 or Office 2021 on a PC ...
Select Install (or depending on your version, Install apps> ). From the home page select Install apps (If you set a different start page, go to aka.ms/office-install .) For Microsoft 365 operated by 21 Vianet go to login.partner.microsoftonline.cn/account. For Microsoft 365 Germany go to portal.office.de/account.
适用于:
Office 2021, Office 2021 for Mac, Office 2019, Office 2019 for Mac, Microsoft 365 家庭版, Office 商业版, Office 365 小型企业版, Microsoft 365 管理员, 由世纪互联运营的 Office 365, 由世纪互联运营的 Office 365 - 管理员版, Microsoft 365 Mac 版, Office 365 Germany – 企业版, Office 365 Germany - 企业管理员版
Download and install the Microsoft Authenticator app
Set up the Authenticator app. After you install the Authenticator app, follow the steps below to add your account: Open the Authenticator app. Select (+) in the upper right corner. Point your camera at the QR code or follow the instructions provided in your account settings. After your account appears in your Authenticator app, you can use the ...
Update drivers manually in Windows - Microsoft Support
In the search box on the taskbar, enter device manager, then select Device Manager. Select a category to see names of devices, then right-click (or press and hold) the one you’d like to update. Select Search automatically for updated driver software. Select Update Driver. If Windows doesn't find a new driver, you can try looking for one on ...
Back up your Windows PC - Microsoft Support
First, launch Windows Backup: select Start , type windows backup, and select Windows Backup from the results. (Or you can select Start > All apps > Windows Backup .) Then select Folders to drop it down, and select which of your user folders you want to back up to OneDrive: You can back up your Desktop, Documents, Pictures, Videos, and Music ...
Contact Us - Microsoft Support
Contact Microsoft Support. Find solutions to common problems, or get help from a support agent.
How to adjust power and sleep settings in Windows
Windows 11 Windows 10. To adjust power and sleep settings in Windows 11, select Start > Settings > System > Power & battery > Screen and sleep. Screen: Select how long you want your device to wait before turning the screen off when you're not using your device. Sleep: Select how long you want your device to wait before going to sleep when you ...
Windows 下载 - Microsoft 支持
语言包. Microsoft Store. 使用适用于你的 Windows 版本的最新免费 Service Pack 和更新来帮助电脑保持最新状态。. 下载免费的语言包以使用你选择的语言查看 Windows。. 在此处下载适用于你的 Windows 平板电脑或计算机的更多应用。. 按照类别、已读用户评论和比较评分来 ...
在 Windows 中配对蓝牙设备 - Microsoft 支持
Windows 11中的 Swift Pair 允许你快速将受支持的蓝牙设备与电脑配对。. 如果蓝牙设备支持“迅速配对”，那么当此蓝牙设备在你附近时，你将收到通知；只需切换到配对模式，设备即可被检测到。. 打开支持“迅速配对”的蓝牙设备，令其可被检测到。. 使其可检测 ...
安装 Microsoft Defender - Microsoft 支持
通过安装 Microsoft Defender，保护 Android、iPhone、Mac 和 Windows 设备免受威胁。. 通过以下方式在设备上下载Microsoft Defender：. 扫描以下 QR 码. 在应用商店中搜索Microsoft Defender. 与设备共享，链接如下： 复制链接. 我们建议在每人至少五台设备上安装Microsoft Defender ...
适用于:
Android 上的 Microsoft Defender, iOS 上的 Microsoft Defender, Mac 上的 Microsoft Defender, Windows 上的 Microsoft Defender
Windows Update Troubleshooter - Microsoft Support
Learn how to run Windows Update Troubleshooter to resolve errors downloading or installing Windows updates.