Put in a Name, Description and Alert Message to be generated.
Change the Severity Level to Informational.
Use the following Alert Rule conditions.
Category > Security
Event Type > Device Control
In the text box, put the following logic:
Device Type LIKE laptop OR Device Type LIKE desktop.
Pressing the down arrow key will automatically populate available options. You can also further customize the above device types to fit your needs (eg you could add logic for servers too.)
Ensure the correct recipient shows under the Recipient option, and the notification method is checked.
Click the Create Alert Rule box to create your custom alert rule.