Solution : https://service.sap.com/sap/support/notes/1596163 (SAP Service marketplace login required)
Key words : 
threadid=449137&tstart=0 downloading sap gui patches, hklm\software\wow6432node\sap\saplogon\, hklm\software\sap\saplogon\, prerequisites program error solution, /irj/sdn/sap-gui, sap logon2 = shortcuts folder, sap logon3 = favorites folder, initially selected top folder, sap logon manually setting, sap gui installation guide
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