Thank you so much for this article! I was wondering how my personal computer never showed the onboarding pop up anymore yet the other computers in my house sometimes do. Apparently I had forgotten how I turned it off, so I just turned it all off for the other computers in the house, thanks!
Quick tip when disabling start menu web search if you want it to apply to all users.
If you want it to apply to all users on the computer and not just the current user, makes sure to create it in the HKEY_LOCAL_MACHINE key location instead of HKEY_CURRENT_USER which will show up like this:
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\Explorer
for the regedit path.