Learn how to use a health report in Windows Security to manage your device performance and keep your device secure.

About digital signatures and certificates in Office, and buying a digital certificate from a certificate authority or create your own.

Add the values in a range by using the Sum function in a formula (ranges meaning more than one group of cells).

Learn how to type a letter online using Word for the web. Choose a letter template for online letter writing. Edit, send or print your letter online.

A workbook is a file that contains one or more worksheets to help you organize data. You can create a new workbook from a blank workbook or a template. By default, a new workbook contains three worksheets, but you can change the number of worksheets that you want a new workbook to contain. You can also add and remove worksheets as needed.

The LINEST function calculates the statistics for a line by using the "least squares" method to calculate a straight line that best fits your data, and then returns an array that describes the line.

Find out how to submit a case review and learn more about your Xbox enforcements.

Microsoft Edge makes it easy to save your passwords as you browse the web. When you enter a new password in the Edge browser on your desktop or mobile device, Microsoft Edge will ask if you want your username and password remembered.

Training: With OneDrive, you can securely store your pictures and files, share and collaborate with others, and get to your files from anywhere - on your computer, laptop, tablet, or phone.

To open File Explorer in Windows 11, select File Explorer on the taskbar or press the Windows logo key + E on your keyboard.. Here are some things to try if File Explorer won't open.