Learn how to access and manage your Windows sign in options. Use a password, Windows Hello, or a security key to unlock your device.

Learn how to upgrade Windows 10 Home to Windows 10 Pro to access more advanced security and networking features.

但如果需要测试多个条件，例如我们假设所有条件都需要为 True 或 False ( AND )，或只有一个条件需要为 True 或 False ( OR )，或者如果想要检查某个条件是否不 ( NOT) 符合你的条件，这时该怎么做呢？ 这三个函数均可以单独使用，但它们更常见于与 IF 函数成对使用。

Using Authenticator as a way to sign in If you have turned on passwordless, two-step, or multi-factor authentication for your account, use the following steps to sign-in: Go to the site where you want to sign in. Enter your username at the sign-in prompt and select Next. Select Send notification. Note: If necessary, select Other ways to sign in then Approve a request on my Microsoft ...

Some PCs can let Windows automatically adjust screen brightness based on the current lighting conditions. To find out if your PC supports this, select Settings > System > Display. Select Brightness, look for the Change brightness automatically when lighting changes check box, and then select it to use this feature. This automatic setting helps make sure your screen is readable wherever you go ...

Windows 11 是一个全新的 Windows 用户界面，使你更接近所喜欢的内容。 凭借直观的导航和简单的组织，Windows 11 拥有全新的外观、更多的应用程序和高效的方式来发挥创造力和生产力。 从确保设备可以运行 Windows 11 到备份文件和安装 Windows 11，了解如何为 Windows 11 升级做好准备。

Windows 11 lets you quickly check your network connection status. Select the Start button, then type settings. Select Settings > Network & internet. The status of your network connection will appear at the top.

如果某个严重问题导致 Windows 意外关闭或重启，则会出现蓝屏错误（有时也称为黑屏错误或终止代码错误）。 你可能会看到一条消息，指出“Windows 已关闭，以防止损坏你的计算机”或类似消息。 借助提示和资源自行进行疑难解答以解决 Windows 蓝屏错误；如果你需要更多帮助，请联系 Microsoft 支持。

Learn how to rip (copy) and burn (create) CDs and data DVDs using Windows Media Player.

了解如何使用 Windows 上的 Game Bar 来捕获游戏过程、与好友聊天和跟踪成就。