Learn how to install Windows 7 Service Pack 1 (SP1). Includes info about how to get the download, requirements, and more.

How to use the SUMIF function in Excel to add the values in a range that meet criteria that you specify.

Subscribed. A Subscribed badge means a Microsoft 365 subscription such as Microsoft 365 Family or Personal is already associated with your account and you can access many of your subscription benefits including installing the desktop apps.. Don't already have Microsoft 365, or you're looking for product details and prices? Buy or try Microsoft 365

The dialog that appears varies depending on whether you had the Add Apps or Get Add-ins option available to you. If you selected Add Apps, the Apps dialog appears. If you selected Get Add-ins, the Add-Ins for Outlook dialog appears. Search for the add-in you want from the available list.

The new Bing is now available to everybody directly from the Windows taskbar, making more ways to interact with your PC across search, answers, chat, and creation available anytime, right on your desktop.

Learn how to change the settings of the mouse buttons, mouse wheel, and pointer.

To import a text file, you can open the file or import the text file as an external data range. To export a text file, use the Save As command.

Learn how to use antivirus protection in Windows Security to protect your Windows PC against malware, viruses, and other threats.

How to sign in to Outlook on the web, access your email, contacts, and calendar.

Internet Explorer 11 support ended on June 15, 2022. We recommend you use Microsoft Edge for a faster, more secure and more modern web browsing experience.