Learn how to find the serial number on your Surface so you can register your product or request service.

Get troubleshooting steps for when you can't sign in to the Xbox app.

If Scroll Lock is on, your cursor moves between columns and rows, not cells. Here's how to turn off Scroll Lock.

This article shows you how to use the Fn key and the F lock key.

Learn why you received a notification about unusual activity in your account and what to do next.

If you already have an account signed in to OneDrive and you want to add or remove another account, you’ll do that in OneDrive Settings.

If you don’t like the default date format, you can pick a different one in Excel, like February 2, 2012 or 2/2/12. You can also create your own custom format in Excel.

Learn how to troubleshoot USB-C problems in Windows and fix USB devices, ports, and adapters not working properly.

Learn how to sign into your PC with Windows Hello using a PIN, facial recognition, or fingerprint.

Learn what PivotTable and PivotCharts are, how you can use them to summarize and analyze your data in Excel, and become familiar with the PivotTable- and PivotChart-specific elements and terms.