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 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 add, remove, connect, and disconnect user accounts in Windows 10 and Windows 11. User accounts let each person have their own settings, documents, and applications on the same device.

Learn how to remove a device from the Phone Link app on your Android or Surface Duo device and your PC. Follow the steps for both devices and sign out of your Microsoft account online.

Find solutions to common problems, or get help from a support agent for Microsoft 365, Office, Windows, Xbox, Surface and more. Sign in to get personalized help and access live chat, phone, or email options.

Learn how to switch out of S mode in Windows 11 or Windows 10 to install apps from outside of the Microsoft Store or to upgrade to Windows 11. S mode is only available in Windows 11 Home edition and is not available in Windows 11 Pro, Enterprise, or Education editions.

Learn how to update your security verification methods for your work or school account, such as the Microsoft Authenticator app. Find out how to add, delete, or manage your devices and app passwords for two-factor verification.

To verify that your digitally signed message was received unaltered by the intended recipients, select the Request S/MIME receipt for all S/MIME signed messages check box. You can request notification telling you who opened the message and when it was opened, When you send a message that uses an S/MIME return receipt request, this verification information is returned as a message sent to your ...

Learn how to use the automated tool to uninstall Office from your computer. Follow the steps for different web browsers and select the version you want to remove.