How to use the SUM function in Excel to add individual values, cell references, ranges, or a mix of all three.

Edit a drop-down list that's based on an Excel Table. If you set up your list source as an Excel table, then all you need to do is add or remove items from the list, and Excel will automatically update any associated drop-downs for you.. To add an item, go to the end of the list and type the new item.

If you get an email about unusual activity on your Microsoft account, or if you’re worried that someone else might have used your account, go to the Recent activity page.You’ll see when your Microsoft account was signed in during the last 30 days, along with any device or app-specific info.

Xbox Game Pass Ultimate includes all Game Pass benefits, including more than 100 high-quality console and PC games. New games are added all the time, so there’s always something new to play.

Get the latest update for Windows 10. Windows 10 automatically downloads and installs updates to make sure your device is secure and up to date.

Explore subscription benefits, browse training courses, learn how to secure your device, and more.

Learn how to delete and restore files in OneDrive. Recover deleted files or folders from the OneDrive recycle bin.

Learn how to troubleshoot Windows sign in issues, including problems signing in to your Windows device after upgrading.

Learn how to add an app to run automatically at startup. Select the Start button and scroll to find the app you want to run at startup.

Share your calendar in an email. If you don't want to give someone permissions to share your calendar and see updates, you can email a static copy of your calendar for a specific date range.