Solution : https://service.sap.com/sap/support/notes/844095 (SAP Service marketplace login required)
Key words :
hkey_local_machine\software\wow6432node\sap\sapgui, matter wether sap logon pad, automatically start sap logon, [hkey_current_user\software\sap\sapgui], 00000000[hkey_current_user\software\sap\sapgui], 00000001[hkey_local_machine\software\sap\sapgui], [hkey_local_machine\software\sap\sapgui], case sap logon pad, cases sap logon pad, 64bit operating systems keys
Related Notes :
| 1156829 | Important SAP notes for the SAP PLM interface |