When prompted, enter the product key. You can find the product key on the sticker on the CD case or other packaging. If you need help, see Find your Product Key for Office 2007.

Microsoft support is here to help you with Microsoft products. Find how-to articles, videos, and training for Microsoft Copilot, Microsoft 365, Windows, Surface, and more.

In the search box on the taskbar, type Manage BitLocker and then select it from the list of results. Or, select the Start button, and then under Windows System, select Control Panel.In Control Panel, select System and Security, and then under BitLocker Drive Encryption, select Manage BitLocker. Note: You'll only see this option if BitLocker is available for your device.

When you back up your files, apps, and settings in the cloud using your Microsoft account, you get 5 GB of free cloud storage and other benefits that protect your files with the latest security and make everyday tasks easier.

Buy stuff from Microsoft Store online (from your mobile device, on Xbox One, in the Microsoft Store app on your Windows 10/11 or Windows 8.1 device, or via the web).

Learn how to run Windows Update Troubleshooter to resolve errors downloading or installing Windows updates.

Immersive Reader advanced color support. In Immersive Reader, we've added many additional ways you can choose a page color.Selecting a page color can make text easy to scan with less eye strain. On the Immersive Reader tab click Page Color to see a 4x5 color picker.. Click More Colors to see additional color selection options such as Wheel, Sliders, Color Palettes, Image Palettes, and Pencils.

To access your sign-in options, go to Start > Settings > Accounts > Sign-in options.. Or just select this button: Go to Sign-in options. Change or manage your password or PIN. To change your password or PIN, go to Start > Settings > Accounts > Sign-in options. Select PIN (Windows Hello), and then select Change PIN.

Why accounts are locked and disabled. Microsoft accounts are usually locked if the account holder has violated our Microsoft Services Agreement.Here are some common reasons why accounts are locked, though not all account locks occur for these reasons:

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。