Hi, @Rick Someone
Thank you for posting in Microsoft Q&A forum.
I read below article, the Edge welcome page and the default browser prompt are related to the two registry keys:
HKEY_CURRENT_USER\SOFTWARE\Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.microsoftedge_8wekyb3d8bbwe\MicrosoftEdge\FirstRun\LastFirstRunVersionDelivered
HKEY_CURRENT_USER\SOFTWARE\Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.microsoftedge_8wekyb3d8bbwe\MicrosoftEdge\Main\IE10TourShown
But the entire Appcontainer registry key structure is not present during the first logon, so that could be the reason we can not disable both Welcome to Windows (Edge) and Tips on startup, we can deploy a script as a logon script with Group Policy or use Configuration Manager, for more details, we may refer to this article:
https://4sysops.com/archives/disable-welcome-to-microsoft-edge-page-and-default-browser-prompt-in-windows-10-1607/
(Third-party link, just for your reference)
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