A workbook is a file that contains one or more worksheets to help you organize data. You can create a new workbook from a blank workbook or a template. By default, a new workbook contains three worksheets, but you can change the number of worksheets that you want a new workbook to contain. You can also add and remove worksheets as needed.

The issues fixed by this method shouldn’t occur in Windows 10 1511 or later. Important: Follow the steps in this method carefully. Serious problems might occur if you modify the registry incorrectly. Before you modify it, back up the registry for restoration in case problems occur.

If you can't sign in. To protect your account, the Outlook.com team won't be able to help if you're having problems signing in. Use the Microsoft account sign-in helper to get back into your account. Get help signing in. If you can sign in. To see self-help answers, or to get support via email, Select Help from the top menu then Help.

Microsoft account help and support. Get help with signing in, locked or compromised accounts, linked accounts, closing, reopening, and updating your security info and account profile.

If your printer isn't responding, downloading and installing the latest printer driver can often resolve these problems. Install the latest printer driver. Here are several ways to update your printer driver. Use Windows Update. Windows Update might find an updated version of your printer driver. To use it:

If you're making the move to a new PC, you don't have to leave behind your photos, videos, files, and folders. You can bring them all with you to your new PC using one of the following options. We recommend using OneDrive to quickly save your files in the cloud. You can then get to your files on your new PC and across all your devices ...

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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。

To open the On-Screen Keyboard. Go to Start , then select Settings > Accessibility > Keyboard, and turn on the On-Screen Keyboard toggle. A keyboard that can be used to move around the screen and enter text will appear on the screen. The keyboard will remain on the screen until you close it.

If you don’t see the Recall This Message command, you probably don’t have an Exchange account or the feature isn’t available within your organization. You can't recall a message that's protected by Azure Information Protection. You can't recall a message in Outlook on the web.