Learn how to find a Windows product key for activation, and when you'll use a digital license instead.

Learn how to upgrade Windows 10 Home to Windows 10 Pro to access more advanced security and networking features.

Describes how to use the System File Checker tool to troubleshoot missing or corrupted system files in Windows 8.1, Windows 8, Windows 7 or Windows Vista.

Learn how to install Office 2013 on your PC or Office for Mac 2011.

Find out how to access OneDrive settings and pause features with the OneDrive Activity Center. Learn how to customize your cloud storage and file sharing preferences.

When you enable an add-in, it adds custom commands and new features to Microsoft 365 programs that help increase your productivity. Because add-ins can be used by attackers to do harm to your computer, you can use add-in security settings to help protect yourself.

Learn how to get ready for the Windows 11 upgrade, from making sure your device can run Windows 11 to backing up your files and installing Windows 11.

Learn how to use the Gaming Services Repair Tool to troubleshoot installation and update issues with Gaming Services on PC.

Learn how to add an app to run automatically at startup. Select the Start button and scroll to find the app you want to run at startup.

Email messages that you receive can be saved as a file on your computer, or a message that you are composing can be saved as a draft and finished later.