Find help and how-to articles for Windows operating systems. Get support for Windows and learn about installation, updates, privacy, security and more.

You can resolve problems with Microsoft Authenticator by checking the tips in this article and reviewing some of the known errors.

Learn how to get Microsoft Store updates for your apps and games. Download the latest versions of Microsoft Store apps and games.

Training: Watch and learn how to use OneDrive to upload, store, edit, and share your files.

Learn how to set up your user account for multifactor authentication with Microsoft 365.

Find out how to manage your Xbox subscriptions to request a refund or cancel a recurring payment.

Use PowerPoint Designer to create stunning slides with professional layouts and tips. Learn how to access and apply this feature in Microsoft 365.

Warning: Excel provides the DATEDIF function in order to support older workbooks from Lotus 1-2-3.The DATEDIF function may calculate incorrect results under certain scenarios. Please see the known issues section of this article for further details.

Get to know your way around Windows 11, from where to search to how to stay organized. Watch the video and read tips about new features.

You can add columns, rows, or cells to an Excel worksheet or delete them. Columns insert to the left, rows above, and cells above or to the left.