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。

Turn your PC off completely. To shut down, select Start and then select Power > Shut down.. Sleep. Sleep uses very little power, your PC starts up faster, and you’re instantly back to where you left off.

In the search box on the taskbar, type device manager, then select Device Manager from the menu.

Where can I find my BitLocker recovery key? BitLocker likely ensured that a recovery key was safely backed up prior to activating protection. There are several places that your recovery key may be, depending on the choice that was made when activating BitLocker:

If you're moving from a Windows 7 or Windows 8.1 PC to a new Windows device, you'll find that the best way to get apps and games is through Microsoft Store.

Before you begin. Driver updates for Windows, along with many devices, such as network adapters, monitors, printers, and video cards, are automatically downloaded and installed through Windows Update.

To install Authenticator on your iOS device. Scan the QR code. or download and install Authenticator from the Apple app store. Get the app

Als je ondersteuning wilt krijgen in Outlook.com, klik je hier of selecteer je Help op de menubalk en voer je je query in. Als de zelfhulp uw probleem niet oplost, schuift u omlaag naar Hebt u nog steeds hulp nodig? en selecteer Ja.. Als je contact met ons wilt opnemen in Outlook.com, moet je je aanmelden. Als u zich niet kunt aanmelden, klikt u hier.

Transfer photos from an iPhone to your PC. First, connect your iPhone to a PC with a USB cable that can transfer files. Turn your phone on and unlock it.

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.