Contact Us - Microsoft Support
Contact Microsoft Support. Find solutions to common problems, or get help from a support agent.
Microsoft Support
Microsoft Support is here to help you with Microsoft products. Find how-to articles, videos, and training for Microsoft Copilot, Microsoft 365, Windows 11, Surface, and more.
Download, install, or reinstall Microsoft 365 or Office 2024 on a PC or ...
Learn how to install, reinstall, or activate Microsoft 365 or Office 2024 on a PC or Mac.
Applies To:
Office 2024, Office 2024 for Mac, Microsoft 365 for home, Office 365 Small Business, Microsoft 365 admin, Microsoft 365 for Mac
Contact - Microsoft Support
Support for Windows 10, Office 2016 and Office 2019 has ended on October 14, 2025. Learn more about your options for Windows 10 or for Office.
Reset your PC - Microsoft Support
Summary Resetting your PC in Windows is a powerful feature that allows you to restore your device to its original state, which can be useful whether you're experiencing performance issues, software problems, or simply want a fresh start. This feature is designed to be user-friendly and provides several options to suit different needs. Before you reset your PC Resetting your PC reinstalls ...
Microsoft 365 and Office resources | Microsoft Support
Find information about Microsoft 365 and Office suites including system requirements for each version.
Applies To:
Office 2024, Office 2021, Office 2019, Office 2016, Microsoft 365
Microsoft Edge 帮助和学习
获取 Microsoft Edge 的帮助和支持。 查找 Microsoft Edge 支持内容、操作方法文章、教程等。
Fix sound or audio problems in Windows - Microsoft Support
Step 5. Check sound settings Step 6. Set default audio device Step 7. Verify that all Windows Updates are installed Step 8. Restart Windows to apply audio-related updates Step 9. Update or reinstall audio drivers Step 10. Check for IDT High Definition Audio CODEC in Device Manager Step 11. Try different audio formats in Windows Sound settings
How to change or delete themes in Windows 10 - Microsoft Support
To delete a theme: Click Start > Settings > Personalization > Themes. Right-click (or press and hold) the theme's tile, and select Delete.
FILTER function | Microsoft Support
Note An array can be thought of as a row of values, a column of values, or a combination of rows and columns of values. In the example above, the source array for our FILTER formula is range A5:D20. The FILTER function will return an array, which will spill if it's the final result of a formula. This means that Excel will dynamically create the appropriate sized array range when you press ...
Applies To:
Excel for Microsoft 365, Excel for Microsoft 365 for Mac, Excel 2024, Excel 2024 for Mac, Excel 2021, Excel 2021 for Mac, Excel for iPad, Excel for iPhone, Excel for Android tablets, Excel for Android phones