Microsoft is pretty good at making Windows a good generic utility laptop for web surfing and general word processing work. Setting up the laptops so users don't need a domain or a login works fairly well and worked really well in XP and Windows 7. However under windows 10 Microsoft can get really annoying with wanting the device associated with a Microsoft Account.
To by pass this notification, it is actually a very simple setting in Windows 10.
Open the settings App
Open Notifications & Actions Settings
By default most if not all the notifications are on. To disable the Microsoft notification un check the "Suggest ways I can finish setting up my device to get the most out of Windows"
Once unchecked the "Add a Microsoft Account" will go away once you reboot, and won't appear on startup.