Create installation media for Windows - Microsoft Support
A product key. A 25-character product key might be needed (not required for digital licenses). For help with finding the product key, go to Find your Windows product key.Many modern devices contain the product key embedded in the firmware of the device.
Screen mirroring and projecting to your PC or wireless display
Note: The Wireless Display app is available on devices running Windows 11 version 22H2 and newer.If you're running an earlier version of Windows, launch the Connect app by entering connect in the search box on the taskbar, and selecting Connect in the list of results. To find out which version of Windows you're running, see Which version of Windows operating system am I running?
Redeem a gift card or code to your Microsoft account
Learn how to redeem a Microsoft gift card, Xbox download code or token, Office product key, or Windows activation code to your Microsoft account. Find troubleshooting tips and contact support if you need help.
Applies To: Microsoft account dashboard
Download and install or reinstall Office 2019, Office 2016, or Office ...
Find out how to download and install Office 2016 on your PC or Mac, or reinstall it if you already have a product key. Learn how to activate Office 2016 and troubleshoot common issues.
Applies To: Office 2019, Office 2016, Office 2016 for Mac, Office 2013
Find your Windows product key - Microsoft Support
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.
Applies To: Microsoft account dashboard
Use the System File Checker tool to repair missing or corrupted system ...
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.
Find your BitLocker recovery key - Microsoft Support
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.
Activate Windows - Microsoft Support
To check activation status in Windows 11, select the Start button, and then select Settings > System and then select Activation .. Your activation status will be listed next to Activation.. Check activation status in Settings. You'll see one of these activation status messages on the Activation page:
How to use the PC Health Check app - Microsoft Support
Learn how to use 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.
Reinstall Windows - Microsoft Support
Notes: Reinstalling Windows 11 using installation media while choosing to ‘Keep nothing’ (a clean install) will automatically enable reserved storage if the partition you reinstall Windows to is 20GB or larger. Reserved storage sets aside disk space to be used by updates, apps, temporary files, and system caches, thus improving the day-to-day function of your PC by ensuring that critical ...