Learn how to activate Office pre-installed on new Windows 10 PCs or with a new product key.

当在新设备中首次启动 Windows 10 时，设备上已安装的防病毒保护程序即是你的默认安全应用。但是，Windows 安全中心已预安装并可随时使用。 如果你想要使用 Windows 安全中心，可卸载其他所有防病毒程序，Windows 安全中心即自动打开。

In quick settings: To find the quick setting for Bluetooth, select the Network, Sound, or Battery icons ( ) next to the time and date on the right side of your taskbar.Select Bluetooth to turn it on. If it's turned on without any Bluetooth devices connected, it might appear as Not connected . If you don't see Bluetooth in quick settings, you might need to add it.

Select Start > Settings > Personalization.The preview window gives you a sneak peek of your changes as you make them. In Personalize your background, you can select a picture, a solid color, or a slideshow of pictures you create.Or you can choose Windows spotlight to see a new image from around the world every day.

Argument name. Description. lookup_value (required). The value you want to look up. The value you want to look up must be in the first column of the range of cells you specify in the table_array argument. For example, if table-array spans cells B2:D7, then your lookup_value must be in column B.. Lookup_value can be a value or a reference to a cell.. table_array (required)

You can right-click the contact group and select Delete from the menu or click the group, then select Delete from the Ribbon.. Contacts are not deleted, only the contact list.

Join a Teams meeting on the web. Don't have the Teams app? You can still join a Teams meeting. In your email invite, select Join the meeting now.. You can also use a dial-in number and conference ID from the email to call in.

The easiest way to get language packs for Windows 8.1 and Windows RT is to download and install them using the Language Control Panel. Download and install additional languages to view menus, dialog boxes, and other user interface items in your preferred language.

Note: The scan creates a backup file during the repair process.To change the default name or location of this backup file, in the Enter name of backup file box, enter a new name, or choose Browse to select the file you want to use. You may need to run the tool several times in order to repair your Outlook Data File.

在选择 Microsoft 365 商业版计划时需要帮助？ 决定计划可能取决于具体的业务需求。 Microsoft 365 计划选择器旨在帮助你完成此操作。 选择器将根据你对问题（例如业务规模、工作领域、使用的设备以及你正在寻找的功能类型、IT 支持和安全性）的回答提出建议。