Learn how to run Windows Update Troubleshooter to resolve errors downloading or installing Windows updates.

Find Microsoft Excel help and learning resources. Explore how-to articles, guides, training videos, and tips to efficiently use Excel.

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

Ways to sign in Use Set up Windows Hello to enable to sign in using face recognition, a fingerprint or a PIN, instead of a password. In this section you can also improve facial recognition or remove it. You can sign in to your account with a physical security key. Learn more. Additional settings Sign in with an external camera or fingerprint reader. If turned on, you disable Enhanced Sign-in ...

App publishers sometimes update their apps to add new features and fix problems. Microsoft Store on Windows can automatically install app updates. Select Start , then search for and select Microsoft Store. In the Microsoft Store app, select Profile (your account photo) > Store Settings. Make sure App updates is turned On.

The Microsoft Authenticator app helps you sign into your accounts when you're using two-step verification.

FAQ Can I still install Publisher after October 2026? If you have a Microsoft 365 subscription, Microsoft Publisher will no longer be available for installation or download after October 2026. However, if you have the Perpetual version of Publisher, although support will end, you will still be able to install and use the app beyond this date. What happens to my existing Publisher files after ...

Count characters in cells by using the LEN function. This topic explains how to count one or more cells and use LEN in an array formula.

Learn how to run Windows Update Troubleshooter to resolve errors downloading or installing Windows updates.

You can change the UAC behavior by opening the Control Panel > System and Security > Change User Account Control settings. Move the slider to your desired level of notification and select OK to save your changes.