Prevent auto-installation of Apps on Windows 10 computers and remove the apps

While disabling the Windows store is not highly recommended, more and more features are using modern applications - it is however an option!  I assume these machines are Windows 10 Pro, as they are not connected to a domain.  On each machine since they are not domain connected Edit local Group policy and go to Computer Configuration -> Administrative Templates -> Windows Components -> Store; in the Settings pane on the right, double click Turn off Store application, select Enabled in the properties page for the policy and click OK.  See this link for details https://social.technet.microsoft.com/Forums/en-US/a8405957-5025-427e-9405-331b1a8dde21/uninstall-or-disable-the-microsoft-store?forum=win10itprogeneral 

You also have some other options to disable downloads etc so you may want to experiment with limiting rather than disabling completely. 

You can also remove applications individually - I have done this lots at Image build time -

Get-AppxPackage *windowsmaps* | Remove-AppxPackage will remove the Maps using powershell

This article details it fairly well on how its done https://www.thewindowsclub.com/remove-built-windows-10-apps-users-using-powershell-script

If you remove the applications and don't disable the Local policy to update apps in the store on an nondomain joined PC, the store apps may show back up depending on how the PC is being patched so consider that...  If the machines are being managed via Intune, you also have some options...  Let me know

Murray