Microsoft Defender is a new security app that helps protect you and your family across all your devices; Windows, Android, Mac, and iOS.

For the best experience, download and install the new version of the Quick Assist app from Microsoft Store. If you have problems installing Quick Assist, here are some steps to try to get it installed and working properly.

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

Contact Microsoft Support. What's new. Surface Pro. Surface Laptop. Surface Laptop Studio 2. Surface Laptop Go 3. Microsoft Copilot. Copilot in Windows. Explore Microsoft products.

This troubleshooter assists customers whose machines are not yet updated to the latest release, Windows 10 Version 1607. This update will initially be released only to a small set of targeted customers. This set will expand over time. Windows users can start the assistant from this article.

To summarize and report results from separate worksheets, you can consolidate data from each into a master worksheet. The worksheets can be in the same workbook as the master worksheet or in other workbooks.

Download the offline installer for Internet Explorer 11 in your preferred language and system from Microsoft Support.

Use Microsoft Teams (work or school) for a Microsoft work or school account or a guest account in Windows 11. Also, find out which version of Teams you’re using.

See how to install Project 2013 and 2016 and Project Pro for Office 365.

Learn how to access and manage your device's settings using the Microsoft Device Manager.