Learn how to upgrade from Windows 10 Home to Windows 10 Pro or Windows 11 Home to Windows 11 Pro, including how to use a valid product key or the Microsoft Store.

How to use the COUNTIF function in Excel to count the number of cells that meet values you set.

This page provides phone numbers of Microsoft customer service.

Download the latest Windows update from the Windows Update page in Settings for your device when it becomes available.

In Outlook, you have the option to: Add a new Yahoo account | Set Yahoo account as primary | Delete existing Yahoo account. Add a new Yahoo email account. On the View tab, select View settings.

Check your network connection status in Windows. Windows 11 lets you quickly check your network connection status. Select the Start button, then type settings.Select Settings > Network & internet.The status of your network connection will appear at the top.

Learn how to get Microsoft account help, troubleshoot sign in issues, keep your account secure, and manage your Microsoft account dashboard.

Change your password with your email provider. See the following sections for instructions on changing your email account password for several major email providers.

Learn how to run a disk cleanup in Windows including deleting temporary and system files to free up disk space.

Learn how to back up apps, settings, files, photos, and Microsoft Edge favorites and preferences on your Windows PC.