The Microsoft Windows operating systems are abbreviated in the table below as follows.Win XP SP3 Microsoft Windows XP Professional Edition + Service Pack 3 Win XP SP2 Microsoft Windows XP Professional Edition + Service Pack 2 Win XP SP1 Microsoft Windows XP Professional Edition + Service Pack 1 or Service Pack 1a Win 2000 SP4 Microsoft Windows 2000 Professional Edition + Service Pack 4 Vista Microsoft Windows Vista 32bit Ultimate or Business Win 2003 SP2 Microsoft Windows Server 2003 + Service Pack 2 Standard Edition with or without R2 as workstation Win 2003 SP1 Microsoft Windows Server 2003 + Service Pack 1 Standard Edition with or without R2 as workstation Win 2003 Microsoft Windows Server 2003 Standard Edition as workstation DOWNLOAD SIMATIC STEP 7 V5.6 SP2 PROFESSIONAL DOWNLOAD SIMATIC STEP 7 V5.6 SP2 PROFESSIONAL.DOWNLOAD SIMATIC STEP 7 V5.6 SP2 SOFTWARE.DOWNLOAD SIMATIC STEP 7 V5.6 SP2 LICENSE KEY.