Locking your Windows device allows you to quickly secure your device while keeping your applications and files open in the background. When you lock your device, anyone trying to access it must enter your password, PIN, or use biometric authentication if you have Windows Hello set up.

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.

查看一个示例，了解如何使用 COUNTIF 函数在 Excel 中对大于或小于数字的数字进行计数。

Help family members shop responsibly by setting allowances in Microsoft accounts. Money added to a Microsoft account can be used to buy movies, games, in-app purchases and more.

Find the information you need to build, run, grow, and support your small business in Microsoft 365.

函数语法. 在你想要时使用. 批注. NPV 函数 (rate、value1、[value2]、...). 使用定期发生的现金流（例如每月或每年）确定净现值。 每个现金流（指定为 值）在期末发生。. 如果在第一个周期开始时有额外的现金流，则应将其添加到 NPV 函数返回的值中。

通过将 Microsoft Rewards 应用下载到 Xbox 主机，在玩游戏或购物时关注积分并赢得积分： 按“Xbox”按钮 打开指南，然后转到“Microsoft Store”。 选择“搜索”，然后在搜索框中输入“Microsoft Rewards”。 从结果中选择 Microsoft Rewards 应用，然后将其下载到主机。

Cookies are small pieces of data stored on your device by websites you visit. They serve various purposes, such as remembering login credentials, site preferences, and tracking user behavior.

Windows 10, version 2004 and Windows Server, version 2004 update history; End of service statement; December 14, 2021—KB5008212 (OS Builds 19041.1415, 19042.1415, 19043.1415, and 19044.1415)

如果需要对一列或一行数字求和，请让 Excel 为你计算。 选择要求和的数字旁边的单元格，在“开始”选项卡上选择“自动求和”，按 Enter，即可完成。 选择“自动求和”时，Excel 会自动输入一个公式 (，该公式使用 SUM 函数) 对数字求和。 下面是一个示例。