An owner or administrator of your personal device activated BitLocker (also called device encryption on some devices) through the Settings app or Control Panel: In this case the user activating BitLocker either selected where to save the key or (in the case of device encryption) it was automatically saved to their Microsoft account.

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。

Wi-Fi tools and apps. Make a Wi-Fi network public or private in Windows. Things to try first. Try these things first to help you fix or narrow down the connection problem. Make sure Wi‑Fi is turned on. Select the "No internet connection" icon on the right side of the taskbar, and make sure Wi-Fi is turned on. If it isn't, select it to turn it on.

Refunds for digital games include Microsoft Store digital game offers, Xbox apps (excluding movies and TV apps), digital gaming bundle offers, digital game durable content, and some digital game consumable content, whether made available through the Xbox console, on your PC, or on your mobile device.

When you install the Microsoft 365 apps on your Windows device, the Microsoft Defender app will automatically be installed for you along with the other apps. If you installed the Microsoft 365 apps before Defender was released, and you still have an active Microsoft 365 Family or Personal subscription, then the Defender app was automatically ...

On the General tab, under Home page, enter the URL of the site you want to set as a homepage.You can add more than one URL. Or, to add the site you're currently viewing, select Use current.If you add more than one URL, put each URL on its own line.

Safe mode starts Windows in a basic state, using a limited set of files and drivers. If a problem doesn't happen in safe mode, this means that default settings and basic device drivers aren't causing the issue.

你可以使用安装介质（U 盘或 DVD）来安装 Windows 的新副本、执行全新安装或重新安装 Windows。 要创建安装介质，请转到软件下载网站，你可以在这里找到分步说明。 在该网站上，你可以选择 Windows 版本，并使用 U 盘或 DVD 创建自己的安装介质。

For more details on additional requirements for your apps or hardware, you should check with the specific publisher or manufacturer. Windows 11 is designed to bring you closer to what you love and is releasing at a time when the PC is playing an even more central role in the way we connect, create and play.

Windows 10 Pro offers more advanced security and business networking features, including: BitLocker Drive Encryption