Solution : https://service.sap.com/sap/support/notes/115806 (SAP Service marketplace login required)
Key words : 
~ftp/general/frontend/patches/rel31i/windows/win32/gn_z, ~ftp/general/frontend/patches/rel40b/windows/win32/gnsmx_z, hkey_current_user\software\sap\sessionmanager\, delete short cuts, affected registry entries, additional key words, 1i session managers, 0b session managers, session managers, sap system
Related Notes : 
       
| 96885 | Downloading front end patches |