Solution : https://service.sap.com/sap/support/notes/149004 (SAP Service marketplace login required)
Key words : 
nt dcom startservice sapstartsrv, additional key words sapstartsrv, radio button groups, 5b standard system, 5b sapstartsrv, manually installing, exe contained, startup type, input template, installation parameters
Related Notes : 
       
| 142100 | Windows: Problems with new SAP service as of Rel. 4.5B |