Locking your Windows device allows you to quickly secure your device while keeping your applications and files open in the background. When you lock your device, anyone trying to access it must enter your password, PIN, or use biometric authentication if you have Windows Hello set up.

Important: Workbook links are considered potentially unsafe and must be enabled when you open a formula workbook.When you open a formula workbook, click Enable Content in the Message Bar to allow the workbook links to function. If you don't, Excel keeps the most recent values and disables refreshing the links with values from the data workbook.

Learn more about updates for Windows 10 version 1903, including improvement and fixes, any known issues, and how to get the update.

Download and install Skype for Business on your PC. Sign in to and out of Skype for Business. Set up an audio device for Skype for Business. Set up and troubleshoot Skype for Business video

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

Important: You don't need to remove old security information unless there is an account security risk (e.g. someone else has access to your old mailbox).

This article describes the formula syntax and usage of the WEEKDAY function in Microsoft Excel.. Description. Returns the day of the week corresponding to a date. The day is given as an integer, ranging from 1 (Sunday) to 7 (Saturday), by default.

Sign in using two-step verification or security info; Create app passwords in Security info (preview) Set up a phone call as your verification method

Establishing internet boundaries is an important way to protect yourself and your family from inappropriate web content. Microsoft Family Safety web and search filters work across any Windows, Xbox and mobile device that has the Microsoft Edge browser and Family Safety apps installed.

The term "alignment" generally specifies the appearance and orientation of the edges of a paragraph -- left-aligned text, right-aligned text, centered text, or "justified" text (aligned evenly from left to right margins).