Solution : https://service.sap.com/sap/support/notes/529151 (SAP Service marketplace login required)
Key words : 
comunicode@sap -> unicode library -> unicode conversion library -> unicode conversion kit, /msplatforms -> microsoft -> windows server27/sep/02unicode sap system installationyou, date    section    description-----------------------------------------------------------------------16/mar/06  iii     backup transport directory, pre-installationii      installationiii     post-installation chronological summary, sapinst displays empty message boxif sapinst displays, unicode sap system installation02/sep/02  iii     installation, sapinst displays empty message box05/feb/03, available05/mar/03  ii      ddic/sap pw, 'microsoft                   server'19/dec/02  iii     sap license, iii     post-installation 16/mar/06back
Related Notes : 
       
| 534334 | Composite SAP note Install./Upgrade SAP R/3 Enterprise 47x11 | 
| 30478 | Windows Service Packs |