Windows 允许添加多个用户帐户以使用同一设备，使每个用户都有自己的设置、文档和应用程序。 例如，家长可以拥有自己的具有管理权限的帐户来管理设置和安装软件，而孩子可以拥有启用了家长控制的标准帐户来监视和限制其使用情况。

Get help and training for Office products, such as Word, Excel, PowerPoint, and Outlook. Learn tips and tricks, troubleshoot issues, and access online resources.

Notes: You don't need a smartphone to receive a security code. Text messages may come from either "MSFT", a short number, or a mobile number.If you have requested a security code, you can trust the message that arrives.

Microsoft generally releases the MSRT on a monthly cadence as part of Windows Update or as a standalone tool. (For exceptions, see Skipped releases.)Use this tool to find and remove specific prevalent threats and reverse the changes that they made (see Covered malware families).For comprehensive malware detection and removal, consider using Windows Defender Offline or Microsoft Safety Scanner.

Note for iPhone: If you are having trouble with your iPhone import, make sure your device is unlocked and you’ve accepted the permissions. Note for Android and other devices: If you’re using an Android phone or other device and import isn’t working, you might need to change your phone’s USB settings from Charging over USB to Transfer Files or Transfer Photos.

Choose the mobile app. Open a browser on your computer and go to portal.office.com.Sign in to your Office 365 for business account.

To resize the image, select the image to see drag handles appear around the image. Move the drag handles to resize the image as necessary. Select the Picture Format tab on the ribbon, then use the options on it to format your image. For example, you can apply a style or a border to the image.

You can use any phone number that can receive text messages; it doesn’t need to be associated with your account. We won't use or give out the phone number, and the code sent to it will expire after 10 minutes.

解决安装 Windows SP1 时遇到的问题. 如果你尝试安装 SP1 并看到指示安装未成功的错误消息，这可能是因为用于安装更新的 Windows 维护服务商店出现问题，或者是因为你的防病毒软件阻止安装更新。

Notes: This feature is not supported if you sign in with a work/school account. If you use an authenticator app or other multifactor sign in, you will need an app password to sign in.. If you want to create another email address that uses the same inbox, sent, items, and contact list as your existing Outlook.com account, read how to create an email alias.