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。

个人设备的所有者或管理员激活了 BitLocker (在某些设备上也称为设备加密，) 通过“设置”应用或控制面板： 在这种情况下，激活 BitLocker 的用户选择了保存密钥的位置，或者在设备加密的情况下选择 (，) 自动将密钥保存到其 Microsoft 帐户。

OneDrive is built in to some versions of Windows and can't be uninstalled. But you can hide it and stop the sync process, so it stays hidden. To do this, turn off all the OneDrive settings and remove the OneDrive folder from File Explorer.

The recommended (and easiest) way to get SP1 is to turn on automatic updating in Windows Update in Control Panel and wait for Windows 7 to notify you that SP1 is ready to install.

A delivery receipt confirms delivery of your email message to the recipient's mailbox, but not that the recipient has seen it or read it. A read receipt confirms that your message was opened.

In the upper left corner of the window, select the app launcher > All apps > SharePoint Tip: If you don't see the SharePoint app under All apps, use the Search box near the top of the window to search for SharePoint.

You'll have to sign out before you can create a new account. If you just need a new name to be associated with your account, you can change your profile photo or name. If you want to connect another email account to your Outlook.com account, you can add your other email accounts to Outlook.com.

Learn how to manage extensions in Microsoft Edge, including adding, disabling, or removing them as needed.

For Microsoft Teams (free), select Settings and more >Settings > About Teams , then look under Version to see if you have the latest version or need to Update now. For Microsoft Teams (work or school), select Settings and more > About , then look under Version.

Some devices don’t have Bluetooth. Make sure Bluetooth is turned on. If you're using a laptop with a physical Bluetooth switch on the body, make sure it’s switched on. In Windows 11, there are two ways to check if Bluetooth is turned on. Here’s how: