If you cannot open your Outlook data file or suspect that the file is damaged, use the Inbox Repair tool (scanpst.exe) to repair errors in the file.

Learn why it's important to have a backup, and how Windows Backup can help you keep your files and settings safe.

Learn how to keep your Microsoft account safe, including making a strong password, identifying safe emails, and reviewing account activity.

Microsoft 365 provides powerful tools to help organize you and your family's lives. Empower you and your family through the Microsoft 365 Family subscription and learn how to create family calendars, share notes with a family notebook on OneDrive, and connect with your family on Microsoft Teams.

To create a document, open Word, select a blank document or template, and start typing. Discover professionally designed templates for Microsoft Word.

Get help and support for Microsoft Edge. Find Microsoft Edge support content, how-to articles, tutorials, and more.

Turn on Focused Inbox, and move items between Focused and Other folders, Includes instructions for new Outlook, classic Outlook, and the web versions of Outlook.

How to use the COUNT function in Excel to count the number of cells that contain numbers, and to count numbers within a list of arguments.

Discover the latest features in Office 2021, including new ways to create content, manage data, and communicate effectively.

If Office activation fails, you'll see Unlicensed Product or Non-commercial use / Unlicensed Product in the title bar of your Office apps, and most features of Office are disabled. To restore all features of Office, you'll need to fix the problem that's causing activation to fail.