Use OneDrive as a cloud backup to share your files and folders with others. Learn how to control permissions, allow editing, or set expiration dates.

Learn about the recovery options in Windows. Find out how to reset your PC, go back to a previous version of Windows, or use media to reinstall Windows.

Learn how to turn on device encryption, or standard BitLocker encryption in Windows.

Contact Microsoft Support. What's new. Surface Pro; Surface Laptop; Surface Laptop Studio 2

Find your product key to activate Windows. A product key is a 25-character code that's used to activate Windows and helps verify that Windows hasn't been used on more PCs than the Microsoft Software License Terms allow.

Learn how to change the refresh rate for your display in Windows to determine how smoothly motion appears on your screen.

Learn how to use Wi-Fi 7 and Wi-Fi 6 and WPA3 in Windows for better wireless coverage and network security.

Learn how to troubleshoot and use the clipboard in Windows to paste multiple items, pin items, and sync your clipboard to the cloud.

了解如何使用产品密钥或数字许可证激活 Windows、检查激活状态，以及链接Microsoft 帐户。

Experience Microsoft Copilot on windows devices using the Copilot app! The Copilot app helps you get answers and inspiration from across the web, supports creativity and collaboration, and helps you focus on the task at hand.