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 the Wireless Display app or the Connect app and select the device you want to cast to.

Learn how to locate your 48-digit BitLocker recovery key when you need to unlock an encrypted drive in Windows. The key can be attached to your Microsoft account, work or school account, printout, or USB flash drive.

Learn how to create a USB flash drive or DVD to install or reinstall Windows 11, 10, 8.1, or 7. You'll need a reliable internet connection, a blank storage device, and a product key (if applicable).

Learn how to locate your 25-character product key or digital license for Windows 10 or Windows 11, depending on how you got your copy. See where to find your product key for Windows 7 or Windows 8.1, and how to tell if it's genuine.

Find help with managing your Xbox subscriptions, such as Game Pass, EA Play, and Games with Gold. Learn how to update your payment options, request refunds, and troubleshoot billing issues.

Learn how to activate Windows 11 using a digital license or a product key. Find out how to check your activation status, link your Microsoft account, and troubleshoot activation issues.

Learn how to download and install or reinstall Office 2019, Office 2016, or Office 2013 on your PC or Mac. Find out how to activate Microsoft 365, troubleshoot issues, and customize your installation options.

Learn how to optimize your Windows PC by updating, restarting, using ReadyBoost, adjusting settings, freeing up space, and more. Find out how to fix common issues that slow down your device and restore it from a system restore point.

Learn how to switch your default search engine in Microsoft Edge to Bing or any other site that uses OpenSearch technology. Follow the steps to select your preferred search engine from the menu or add a new one.

Learn how to use Microsoft Defender to check your device for viruses or malware on Windows, Android, or Mac. Find out the signs of infection, the types of scans, and how to run Microsoft Defender Offline for a deeper scan.