Learn how to use a USB flash drive or DVD to install, reinstall, or perform a clean installation of Windows 10, 8.1, 7, or 11. Find the software download website, product key, and recovery options.

Learn how to mirror or project another device's screen to your Windows PC using Miracast. Follow the steps for Windows 11 or Windows 10 to install and use the Wireless Display app or the Connect app.

Learn about the data breach that exposed over 2.7 billion records of personal data of nearly 170 million people in early 2024. Find out the risks, recommended actions, and how to use Microsoft Defender for identity theft monitoring and protection.

Learn how to troubleshoot sound or audio issues in Windows 11 or Windows 10 with step-by-step instructions and tips. Check your speaker output, run the audio troubleshooter, update or uninstall your audio driver, and more.

Learn how to download and install Microsoft 365 or Office 2021 on a PC or Mac with a Microsoft account, work or school account. Find tips, troubleshooting, and activation steps for Microsoft 365 or Office products.

Learn how to download and install Microsoft 365 or Office 2019, 2016, or 2013 on your PC or Mac. Find out how to activate Office, troubleshoot issues, and switch languages or bit versions.

Learn how to use 25-character codes to make Xbox purchases and extend your Xbox subscriptions. Follow the instructions for different devices and platforms, such as Xbox Series X|S, Xbox One, PC, and Microsoft Store.

Learn how to insert, remove, and toggle checkboxes in Excel for interactive lists and forms. Checkboxes have the value TRUE or FALSE depending on their state, which you can use in formulas.

Copilot is a feature that requires a subscription and a compatible account. Learn how to check your license, update your channel, and adjust your privacy settings to find and use Copilot in Word, Excel, PowerPoint, and Outlook.

了解如何排查 Windows 中的蓝牙问题。 解决连接蓝牙设备或配件时出现的问题。