Learn how to use SelfCert.exe to create a digital certificate for digitally signing Office documents. Find out where to download SelfCert.exe and how to view your certificate in Internet Explorer.

Learn how to use the System File Checker tool (SFC.exe) to scan and restore Windows system files that are not working or causing crashes. Follow the steps to run SFC.exe, view the scan results, and manually replace the corrupted files if needed.

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.

Learn how to remove apps and programs from your Windows 10 or 11 device using different methods. Find tips and troubleshooters for common issues and errors.

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.

Learn how to share files or folders over a Local Area Network (or LAN) in Windows 11 and Windows 10. Find out how to turn on network discovery, troubleshoot sharing problems, and use OneDrive to share files over the Internet.

Learn how to download and install Microsoft 365 apps, like Word, Excel, and PowerPoint, on your PC or Mac. Follow the instructions in the browser and sign in with your Microsoft 365 account to activate the apps.

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, and can help with security and privacy.

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

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 Office apps.