Inno Setup launch program at user login

The official post¹ about this topic hasn't been updated in a long while. So here is a short wizard friendly refresh.

For all users

Creating a startup shortcut to the common start menu Startup folder requires the installer to be run in administrative installation mode, if not done through the wizard add the following line to the Setup block.

[Setup]
PrivilegesRequired=admin

Assuming that that the following compiler directives are defined '#MyAppName' and '#MyAppExeName', normally done in the very last step of the script wizard, append the following line to the Icons segment.

[Icons]
Name: "{commonstartup}\{#MyAppName}"; Filename: "{app}\{#MyAppExeName}"

The 'commonstartup' points to

C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Startup

For user (installer) only

No administrative installation mode is required here. As before presuming you have the defined directives, in the Icons block.

[Icons]
Name: "{userstartup}\{#MyAppName}"; Filename: "{app}\{#MyAppExeName}"

'userstartup' leads to

C:\Users\__Username__\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup