@burnout426
I did some tests:
Using the syntax
"Opera_99.0.4788.77_Setup_x64.exe --run-at-startup=0 /silent /norestart /allusers=yes /launchopera=0 /setdefaultbrowser=no"
and starting Opera afterwards without rebooting, the setting "Run when my computer starts" is checked (for the current user).
Using the syntax
"Opera_99.0.4788.77_Setup_x64.exe --run-at-startup=0 /silent /norestart /allusers=yes /launchopera=0 /setdefaultbrowser=no"
and starting Opera after a reboot, the setting "Run when my computer starts" is unchecked (for all users).
I have no idea why the setting "Run when my computer starts" is not unchecked immediately after the installation for the current user. I hope it is a bug with the installer that will be fixed soon.