Learn how to scan and repair missing or corrupted system files in Windows using the System File Checker tool (sfc/scannow). Follow the steps to run the tool, view the scan results, and manually replace the corrupted files if needed.

Learn how to use the PC Health Check app or manual steps to see if your device meets the system requirements for Windows 11 after changing your hardware. Find out how the upgrade offer is based on various factors and how to refresh the assessment.

Learn how to use Microsoft Defender Antivirus to scan and remove malware from your PC. Follow the steps to run an offline scan, view the results, and take action on the detected threats.

Learn how to redeem Microsoft and Xbox gift cards, download codes, tokens, and Office product keys to your Microsoft account. Find troubleshooting tips and contact support if you need help.

Learn how to fix errors while downloading and installing Windows updates using the Update Troubleshooter. Follow the steps to run the troubleshooter, restart your device, and check for new updates.

Learn how to find, add, turn off, and remove extensions in Microsoft Edge, the browser for Windows 11 and Windows 10. Extensions are tools that customize your browser experience and offer you more control.

Learn how to add, remove, connect, and disconnect user accounts in Windows 10 and Windows 11. Find out how to use Microsoft accounts, local accounts, and administrator accounts for personal and work or school use.

Learn how to check if your PC can run Windows 11, transfer your files and favorites, back up your data, and install Windows 11. Find out about the new features, apps, and productivity tools on Windows 11.

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

Learn how to search for documents across your PC and OneDrive using the taskbar, File Explorer, or Office.com. Filter your search results by document type, location, or cloud service.