Search notes:

Registry: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run contains a user's autostart entries, i. e. the commands that will be run each time a user logs on (not at boot time).
The following PowerShell command adds Windows Terminal to the list of automatically started programs: 
$null = new-itemProperty -path HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Run -name 'Windows Terminal' -value '%localappdata%\Microsoft\WindowsApps\wt.exe'

See also

Programs that might automatically be started in Windows (and the «run keys» in the registry).
Compare with the value of Autorun in HKEY_CURRENT_USER\Software\Microsoft\Command Processor and the corresponding key under HKEY_LOCAL_MACHINE.
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce
One of the entries listed in HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run is %SYSTEMROOT%\System32\SecurityHealthService.exe.

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