Use data validation rules to control the type of data or the values that users enter into a cell. One example of validation is a drop-down list (also called a drop-down box or drop-down menu). Watch more in this video.

Get a brief explanation about logging on as an administrator and making changes to other user accounts on your computer.

Get troubleshooting tips to fix problems with apps from Microsoft Store.

Find and open File Explorer in Windows 10 and Windows 11, and customize Quick access by pinning and removing files and folders.

See a list of options available for starting Windows in diagnostic modes such as safe mode.

Erfahren Sie, wie Sie einen Windows-Product Key für die Aktivierung finden und wann Sie stattdessen eine digitale Lizenz verwenden.

Contact Microsoft Support. Find solutions to common problems, or get help from a support agent.

Improve your writing skills with Word's tools for spelling, grammar, and clarity. Find out how to check and correct errors in your documents.

How to use Storage Sense to free up hard drive space on your Windows device.

How to track changes in Word using revision marks. Accept, reject, or hide changes made by others working in the file.