Edit a drop-down list that's based on an Excel Table. If you set up your list source as an Excel table, then all you need to do is add or remove items from the list, and Excel will automatically update any associated drop-downs for you.. To add an item, go to the end of the list and type the new item.

Search for files. Looking for an older file? Search is a powerful tool to find all your online files. Type a word or phrase in the Search box.

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.

Keeping your login information secure will sometimes require you to change a password. You can easily edit the passwords saved in Microsoft Edge.

Use your Microsoft account to sign in to Microsoft services like Windows, Microsoft 365, OneDrive, Skype, Outlook, and Xbox Live.

了解在 Windows 中查找 BitLocker 恢复密钥的不同方法，并了解如何在系统上激活 BitLocker。

Learn how to use the privacy dashboard in your Microsoft account and manage your privacy settings for products you use.

Learn how to get ready for the Windows 11 upgrade, from making sure your device can run Windows 11 to backing up your files and installing Windows 11.

There are many ways to shut down your PC—you can turn the PC off completely, you can make it sleep, or you can hibernate the PC.

To create a document, open Word, select a blank document or template, and start typing. Discover professionally designed templates for Microsoft Word.