Defragment your Windows 10 PC - Microsoft Support
Defragment your Windows 10 PC. Optimizing your drives can help your PC run smoother and boot up faster.
Keyboard shortcuts in Microsoft 365 - Microsoft Support
In this article, you can find links to the keyboard shortcut articles for most Microsoft 365 apps.
Applies To:
Excel for Microsoft 365, Word for Microsoft 365, Outlook for Microsoft 365, PowerPoint for Microsoft 365, Access for Microsoft 365, OneNote for Microsoft 365, Project Online Desktop Client, Visio Plan 2, Visio in Microsoft 365, Visio Plan 1, Excel 2021, Word 2021, Outlook 2021, PowerPoint 2021, Access 2021, Project Professional 2021, Visio Professional 2021, Visio Standard 2021, Office 2021, OneNote 2021, Excel 2019, Word 2019, Outlook 2019, PowerPoint 2019, Access 2019, Project Professional 2019, Visio Professional 2019, Visio Standard 2019, Office 2019, Excel 2016, Word 2016, Outlook 2016, PowerPoint 2016, Access 2016, OneNote 2016, Project Professional 2016, Visio Professional 2016, Visio Standard 2016, Office 2016, Excel for iPhone, Word for iPhone, PowerPoint for iPhone, Excel for Android phones, Outlook Calendar for Windows 10, Outlook Mail for Windows 10, PowerPoint for Android phones, Word for Android phones
Add or remove items from a drop-down list - Microsoft Support
Add or remove items from an existing drop-down list (also called a drop-down menu or drop-down box).
Applies To:
Excel for Microsoft 365, Excel for Microsoft 365 for Mac, Excel for the web, Excel 2021, Excel 2021 for Mac, Excel 2019, Excel 2019 for Mac, Excel 2016
Open and run DxDiag.exe - Microsoft Support
Learn how to open and run DxDiag.exe on Windows to collect device information and troubleshoot DirectX sound and video issues.
How to use the taskbar in Windows - Microsoft Support
Learn how to use the taskbar features in Windows. Hide the taskbar, pin an app, change the location, and more with taskbar settings.
Accessing Credential Manager - Microsoft Support
Accessing Credential Manager. Credential Manager lets you view and delete your saved credentials for signing in to websites, connected applications, and networks.
App permissions - Microsoft Support
Learn how to locate and manage your app permissions on Windows devices. Some apps or games need specific permissions to work properly.
Turn on device encryption - Microsoft Support
Learn how to turn on device encryption, or standard BitLocker encryption in Windows.
重置忘记的 Microsoft 帐户密码 - Microsoft 支持
2.验证你的身份. 为了保护你的安全，Microsoft 必须先验证你的身份，你才能继续重置密码。
Applies To:
Microsoft account dashboard
Make and receive phone calls from your PC - Microsoft Support
Leave your Android device in your pocket the next time it rings — pick up the call from your PC instead. Calling requires Bluetooth capability on both your PC and on your Android device, so make sure you have it turned on for both.