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

Learn how to troubleshoot common sound or audio issues in Windows 11 and Windows 10. Follow the steps to check your speaker output, run the audio troubleshooter, update or uninstall your audio driver, and more.

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 and connect to a wireless display.

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 get to the Desktop, Documents, and Pictures folders in File Explorer by default or by pinning them in Quick access. Find out how to restore the left navigation pane and the standard Windows 11 user file folders.

Learn how to download and install or reinstall Microsoft 365 or Office 2021 on a PC or Mac. Find out the system requirements, product keys, activation steps, and troubleshooting tips.

Learn how to customize your PC with themes that combine background pictures, window colors, and sounds. Find and install themes from the Microsoft Store or other sources.

Learn how to use the PC Health Check app or the Microsoft Compatibility Appraiser task to see if your device meets the system requirements for Windows 11 after changing your hardware. Find out how to refresh the eligibility assessment and what factors affect the upgrade offer.

Learn how to upgrade to Windows 11 from Windows 10 using Windows Update, Installation Assistant, or installation media. Note that some features and apps require higher system requirements than the minimum.

Learn how to locate your BitLocker recovery key, a 48-digit number needed to unlock an encrypted drive in Windows. See where to find it attached to your Microsoft account, work or school account, printout, or USB flash drive.