Learn how to use the PC Health Check app to check your device health, performance, and Windows 11 eligibility. Find out how to install, update, and troubleshoot the app from Microsoft Support.

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

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 TV, projector, or other display.

Remote Assistance Support from Microsoft allows a Microsoft support professional in another location to view your computer screen and work on your computer over a secured connection.Protect yourself from tech support scams.

Learn how to use the System File Checker tool (SFC.exe) to scan and restore missing or corrupted system files in Windows. Follow the steps to run the tool, view the scan results, and manually replace the corrupted files if needed.

Learn how to locate your 25-character product key or digital license for Windows 10, Windows 11, Windows 8.1, or Windows 7. See where to find the product key on your device, box, or sticker, or how to contact the manufacturer if you've lost it.

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 use Windows File Recovery, a command line app, to try to restore files that have been deleted from your local storage device and can’t be restored from the Recycle Bin. This app requires Windows 10 build 19041 or later and supports only internal drives, external drives, and USB devices.

Learn how to activate Microsoft 365 or a non-subscription version of Office with a product key, a Microsoft account, or a trial version. Troubleshoot activation errors and get help with guided support.

Learn how to speed up your PC with 10 suggestions, such as updating Windows and drivers, restarting, using ReadyBoost, and disabling unnecessary programs. Find out how to check for low disk space, viruses, and malware, and restore your PC from a system restore point.