Untitled

Inno Setup: Disable postinstall checkbox with CLI flags
[Run]
Filename: {app}App.exe; Description: {cm:LaunchProgram,App}; Flags: nowait postinstall; Check: NoRunSwitch


[Code]
function NoRunSwitch: boolean;
var
  i: integer;
begin
  // Return TRUE to show the checkbox on the final page, return FALSE to hide it.
  Result := True; // In case there are no parameters
  for i := 1 to ParamCount do
  begin
    // Tweak the switch parsing to suit your needs here
    Result := not (UpperCase(ParamStr(i)) = '/NORUN');
    if not Result then break;
  end;
end;