Get answers to some basic questions about what two-step verification is, and how to set it up and use it to help keep your Microsoft account more secure.

See how to find things you've downloaded on your PC.

Learn how to use the taskbar features in Windows. Hide the taskbar, pin an app, change the location, and more with taskbar settings.

Learn how to protect your PC, identity, and data from tech support scams.

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.

Find solutions for common issues with Game Bar on Windows, including keyboard shortcut problems.

How to use the LOOKUP function in Excel to search in a single row or column and find a value from the same position in a second row or column.

This page provides phone numbers of Microsoft customer service.

How to use the SUMIFS function in Excel, one of Excel’s math and trig functions, to add arguments that meet multiple criteria.

In Outlook, the black color theme includes dark mode, which provides a black background (instead of white) for the message window. You can switch to a white background for the message window if you prefer.